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Docker Mailserver
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Tutorials | Basic Installation
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docker-mailserver
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Home
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Introduction
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Usage
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Configuration
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Examples
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FAQ
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Contributing
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DockerHub
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GHCR
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Docker Mailserver
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< svg xmlns = "http://www.w3.org/2000/svg" viewBox = "0 0 496 512" > <!-- ! Font Awesome Free 6.3.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free (Icons: CC BY 4.0, Fonts: SIL OFL 1.1, Code: MIT License) Copyright 2023 Fonticons, Inc. --> < path d = "M165.9 397.4c0 2-2.3 3.6-5.2 3.6-3.3.3-5.6-1.3-5.6-3.6 0-2 2.3-3.6 5.2-3.6 3-.3 5.6 1.3 5.6 3.6zm-31.1-4.5c-.7 2 1.3 4.3 4.3 4.9 2.6 1 5.6 0 6.2-2s-1.3-4.3-4.3-5.2c-2.6-.7-5.5.3-6.2 2.3zm44.2-1.7c-2.9.7-4.9 2.6-4.6 4.9.3 2 2.9 3.3 5.9 2.6 2.9-.7 4.9-2.6 4.6-4.6-.3-1.9-3-3.2-5.9-2.9zM244.8 8C106.1 8 0 113.3 0 252c0 110.9 69.8 205.8 169.5 239.2 12.8 2.3 17.3-5.6 17.3-12.1 0-6.2-.3-40.4-.3-61.4 0 0-70 15-84.7-29.8 0 0-11.4-29.1-27.8-36.6 0 0-22.9-15.7 1.6-15.4 0 0 24.9 2 38.6 25.8 21.9 38.6 58.6 27.5 72.9 20.9 2.3-16 8.8-27.1 16-33.7-55.9-6.2-112.3-14.3-112.3-110.5 0-27.5 7.6-41.3 23.6-58.9-2.6-6.5-11.1-33.3 2.6-67.9 20.9-6.5 69 27 69 27 20-5.6 41.5-8.5 62.8-8.5s42.8 2.9 62.8 8.5c0 0 48.1-33.6 69-27 13.7 34.7 5.2 61.4 2.6 67.9 16 17.7 25.8 31.5 25.8 58.9 0 96.5-58.9 104.2-114.8 110.5 9.2 7.9 17 22.9 17 46.4 0 33.7-.3 75.4-.3 83.6 0 6.5 4.6 14.4 17.3 12.1C428.2 457.8 496 362.9 496 252 496 113.3 383.5 8 244.8 8zM97.2 352.9c-1.3 1-1 3.3.7 5.2 1.6 1.6 3.9 2.3 5.2 1 1.3-1 1-3.3-.7-5.2-1.6-1.6-3.9-2.3-5.2-1zm-10.8-8.1c-.7 1.3.3 2.9 2.3 3.9 1.6 1 3.6.7 4.3-.7.7-1.3-.3-2.9-2.3-3.9-2-.6-3.6-.3-4.3.7zm32.4 35.6c-1.6 1.3-1 4.3 1.3 6.2 2.3 2.3 5.2 2.6 6.5 1 1.3-1.3.7-4.3-1.3-6.2-2.2-2.3-5.2-2.6-6.5-1zm-11.4-14.7c-1.6 1-1.6 3.6 0 5.9 1.6 2.3 4.3 3.3 5.6 2.3 1.6-1.3 1.6-3.9 0-6.2-1.4-2.3-4-3.3-5.6-2z" / > < / svg >
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< div class = "md-source__repository" >
docker-mailserver
< / div >
< / a >
< / div >
< ul class = "md-nav__list" data-md-scrollfix >
< li class = "md-nav__item" >
< a href = "../../.." class = "md-nav__link" >
Home
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../../../introduction/" class = "md-nav__link" >
Introduction
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../../../usage/" class = "md-nav__link" >
Usage
< / a >
< / li >
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< li class = "md-nav__item md-nav__item--nested" >
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< input class = "md-nav__toggle md-toggle md-toggle--indeterminate" type = "checkbox" id = "__nav_4" >
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< label class = "md-nav__link" for = "__nav_4" id = "__nav_4_label" tabindex = "0" >
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Configuration
< span class = "md-nav__icon md-icon" > < / span >
< / label >
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< nav class = "md-nav" data-md-level = "1" aria-labelledby = "__nav_4_label" aria-expanded = "false" >
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< label class = "md-nav__title" for = "__nav_4" >
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< span class = "md-nav__icon md-icon" > < / span >
Configuration
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
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< li class = "md-nav__item" >
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< a href = "../../../config/environment/" class = "md-nav__link" >
Environment Variables
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< / a >
< / li >
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< li class = "md-nav__item md-nav__item--nested" >
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< input class = "md-nav__toggle md-toggle md-toggle--indeterminate" type = "checkbox" id = "__nav_4_2" >
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< label class = "md-nav__link" for = "__nav_4_2" id = "__nav_4_2_label" tabindex = "0" >
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User Management
< span class = "md-nav__icon md-icon" > < / span >
< / label >
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< nav class = "md-nav" data-md-level = "2" aria-labelledby = "__nav_4_2_label" aria-expanded = "false" >
< label class = "md-nav__title" for = "__nav_4_2" >
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< span class = "md-nav__icon md-icon" > < / span >
User Management
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
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< li class = "md-nav__item" >
< a href = "../../../config/user-management/accounts/" class = "md-nav__link" >
Accounts
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../../../config/user-management/aliases/" class = "md-nav__link" >
Aliases
< / a >
< / li >
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< / ul >
< / nav >
< / li >
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< li class = "md-nav__item md-nav__item--nested" >
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< input class = "md-nav__toggle md-toggle md-toggle--indeterminate" type = "checkbox" id = "__nav_4_3" >
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< label class = "md-nav__link" for = "__nav_4_3" id = "__nav_4_3_label" tabindex = "0" >
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Best Practices
< span class = "md-nav__icon md-icon" > < / span >
< / label >
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< nav class = "md-nav" data-md-level = "2" aria-labelledby = "__nav_4_3_label" aria-expanded = "false" >
< label class = "md-nav__title" for = "__nav_4_3" >
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< span class = "md-nav__icon md-icon" > < / span >
Best Practices
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
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< li class = "md-nav__item" >
< a href = "../../../config/best-practices/dkim/" class = "md-nav__link" >
DKIM
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../../../config/best-practices/dmarc/" class = "md-nav__link" >
DMARC
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../../../config/best-practices/spf/" class = "md-nav__link" >
SPF
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../../../config/best-practices/autodiscover/" class = "md-nav__link" >
Auto-discovery
< / a >
< / li >
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< / ul >
< / nav >
< / li >
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< li class = "md-nav__item md-nav__item--nested" >
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< input class = "md-nav__toggle md-toggle md-toggle--indeterminate" type = "checkbox" id = "__nav_4_4" >
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< label class = "md-nav__link" for = "__nav_4_4" id = "__nav_4_4_label" tabindex = "0" >
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Security
< span class = "md-nav__icon md-icon" > < / span >
< / label >
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< nav class = "md-nav" data-md-level = "2" aria-labelledby = "__nav_4_4_label" aria-expanded = "false" >
< label class = "md-nav__title" for = "__nav_4_4" >
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< span class = "md-nav__icon md-icon" > < / span >
Security
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
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< li class = "md-nav__item" >
< a href = "../../../config/security/understanding-the-ports/" class = "md-nav__link" >
Understanding the Ports
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../../../config/security/ssl/" class = "md-nav__link" >
SSL/TLS
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../../../config/security/fail2ban/" class = "md-nav__link" >
Fail2Ban
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../../../config/security/mail_crypt/" class = "md-nav__link" >
Mail Encryption
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../../../config/security/rspamd/" class = "md-nav__link" >
Rspamd
< / a >
< / li >
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< / ul >
< / nav >
< / li >
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< li class = "md-nav__item" >
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< a href = "../../../config/debugging/" class = "md-nav__link" >
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Debugging
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../../../config/pop3/" class = "md-nav__link" >
Mail Delivery with POP3
< / a >
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< / li >
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< li class = "md-nav__item" >
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< a href = "../../../config/setup.sh/" class = "md-nav__link" >
Your Friend setup.sh
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< / a >
< / li >
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< li class = "md-nav__item md-nav__item--nested" >
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< input class = "md-nav__toggle md-toggle md-toggle--indeterminate" type = "checkbox" id = "__nav_4_8" >
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< label class = "md-nav__link" for = "__nav_4_8" id = "__nav_4_8_label" tabindex = "0" >
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Advanced Configuration
< span class = "md-nav__icon md-icon" > < / span >
< / label >
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< nav class = "md-nav" data-md-level = "2" aria-labelledby = "__nav_4_8_label" aria-expanded = "false" >
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< label class = "md-nav__title" for = "__nav_4_8" >
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< span class = "md-nav__icon md-icon" > < / span >
Advanced Configuration
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
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< li class = "md-nav__item" >
< a href = "../../../config/advanced/optional-config/" class = "md-nav__link" >
Optional Configuration
< / a >
< / li >
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< li class = "md-nav__item md-nav__item--nested" >
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< input class = "md-nav__toggle md-toggle md-toggle--indeterminate" type = "checkbox" id = "__nav_4_8_2" >
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< label class = "md-nav__link" for = "__nav_4_8_2" id = "__nav_4_8_2_label" tabindex = "0" >
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Maintenance
< span class = "md-nav__icon md-icon" > < / span >
< / label >
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< nav class = "md-nav" data-md-level = "3" aria-labelledby = "__nav_4_8_2_label" aria-expanded = "false" >
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< label class = "md-nav__title" for = "__nav_4_8_2" >
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< span class = "md-nav__icon md-icon" > < / span >
Maintenance
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
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< li class = "md-nav__item" >
< a href = "../../../config/advanced/maintenance/update-and-cleanup/" class = "md-nav__link" >
Update and Cleanup
< / a >
< / li >
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< / ul >
< / nav >
< / li >
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< li class = "md-nav__item md-nav__item--nested" >
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< input class = "md-nav__toggle md-toggle md-toggle--indeterminate" type = "checkbox" id = "__nav_4_8_3" >
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< label class = "md-nav__link" for = "__nav_4_8_3" id = "__nav_4_8_3_label" tabindex = "0" >
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Override the Default Configs
< span class = "md-nav__icon md-icon" > < / span >
< / label >
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< nav class = "md-nav" data-md-level = "3" aria-labelledby = "__nav_4_8_3_label" aria-expanded = "false" >
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< label class = "md-nav__title" for = "__nav_4_8_3" >
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< span class = "md-nav__icon md-icon" > < / span >
Override the Default Configs
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
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< li class = "md-nav__item" >
< a href = "../../../config/advanced/override-defaults/dovecot/" class = "md-nav__link" >
Dovecot
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../../../config/advanced/override-defaults/postfix/" class = "md-nav__link" >
Postfix
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../../../config/advanced/override-defaults/user-patches/" class = "md-nav__link" >
Modifications via Script
< / a >
< / li >
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< / ul >
< / nav >
< / li >
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< li class = "md-nav__item" >
< a href = "../../../config/advanced/auth-ldap/" class = "md-nav__link" >
LDAP Authentication
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../../../config/advanced/mail-sieve/" class = "md-nav__link" >
Email Filtering with Sieve
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../../../config/advanced/mail-fetchmail/" class = "md-nav__link" >
Email Gathering with Fetchmail
< / a >
< / li >
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< li class = "md-nav__item md-nav__item--nested" >
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< input class = "md-nav__toggle md-toggle md-toggle--indeterminate" type = "checkbox" id = "__nav_4_8_7" >
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< label class = "md-nav__link" for = "__nav_4_8_7" id = "__nav_4_8_7_label" tabindex = "0" >
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Email Forwarding
< span class = "md-nav__icon md-icon" > < / span >
< / label >
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< nav class = "md-nav" data-md-level = "3" aria-labelledby = "__nav_4_8_7_label" aria-expanded = "false" >
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< label class = "md-nav__title" for = "__nav_4_8_7" >
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< span class = "md-nav__icon md-icon" > < / span >
Email Forwarding
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
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< li class = "md-nav__item" >
< a href = "../../../config/advanced/mail-forwarding/relay-hosts/" class = "md-nav__link" >
Relay Hosts
< / a >
< / li >
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< li class = "md-nav__item" >
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Basic Installation
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Basic Installation
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A Basic Example With Relevant Environmental Variables
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A Basic LDAP Setup
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Using DMS as a local mail relay for containers
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Mailserver behind Proxy
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Building your own Docker image
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Forward-Only Mail-Server with LDAP
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Customize IMAP Folders
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General Information
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GHCR
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A Basic Example With Relevant Environmental Variables
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A Basic LDAP Setup
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Using DMS as a local mail relay for containers
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< h1 > Basic Installation< / h1 >
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< h2 id = "a-basic-example-with-relevant-environmental-variables" > < a class = "toclink" href = "#a-basic-example-with-relevant-environmental-variables" > A Basic Example With Relevant Environmental Variables< / a > < / h2 >
< p > This example provides you only with a basic example of what a minimal setup could look like. We < strong > strongly recommend< / strong > that you go through the configuration file yourself and adjust everything to your needs. The default < a href = "https://github.com/docker-mailserver/docker-mailserver/blob/master/docker-compose.yml" > docker-compose.yml< / a > can be used for the purpose out-of-the-box, see the < a href = "../../../usage/" > < em > Usage< / em > chapter< / a > .< / p >
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< div class = "highlight" > < pre > < span > < / span > < code > < span class = "nt" > services< / span > < span class = "p" > :< / span >
< span class = "w" > < / span > < span class = "nt" > mailserver< / span > < span class = "p" > :< / span >
< span class = "w" > < / span > < span class = "nt" > image< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ghcr.io/docker-mailserver/docker-mailserver:latest< / span >
< span class = "w" > < / span > < span class = "nt" > container_name< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > mailserver< / span >
< span class = "w" > < / span > < span class = "c1" > # Provide the FQDN of your mail server here (Your DNS MX record should point to this value)< / span >
< span class = "w" > < / span > < span class = "nt" > hostname< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > mail.example.com< / span >
< span class = "w" > < / span > < span class = "nt" > ports< / span > < span class = "p" > :< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "s" > " 25:25" < / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "s" > " 465:465" < / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "s" > " 587:587" < / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "s" > " 993:993" < / span >
< span class = "w" > < / span > < span class = "nt" > volumes< / span > < span class = "p" > :< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ./docker-data/dms/mail-data/:/var/mail/< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ./docker-data/dms/mail-state/:/var/mail-state/< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ./docker-data/dms/mail-logs/:/var/log/mail/< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ./docker-data/dms/config/:/tmp/docker-mailserver/< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > /etc/localtime:/etc/localtime:ro< / span >
< span class = "w" > < / span > < span class = "nt" > environment< / span > < span class = "p" > :< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ENABLE_RSPAMD=1< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ENABLE_CLAMAV=1< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ENABLE_FAIL2BAN=1< / span >
< span class = "w" > < / span > < span class = "nt" > cap_add< / span > < span class = "p" > :< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > NET_ADMIN< / span > < span class = "w" > < / span > < span class = "c1" > # For Fail2Ban to work< / span >
< span class = "w" > < / span > < span class = "nt" > restart< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > always< / span >
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< / code > < / pre > < / div >
< h2 id = "a-basic-ldap-setup" > < a class = "toclink" href = "#a-basic-ldap-setup" > A Basic LDAP Setup< / a > < / h2 >
< p > < strong > Note< / strong > There are currently no LDAP maintainers. If you encounter issues, please raise them in the issue tracker, but be aware that the core maintainers team will most likely not be able to help you. < strong > We would appreciate and we encourage everyone to actively participate in maintaining LDAP-related code by becoming a maintainer!< / strong > < / p >
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< div class = "highlight" > < pre > < span > < / span > < code > < span class = "nt" > services< / span > < span class = "p" > :< / span >
< span class = "w" > < / span > < span class = "nt" > mailserver< / span > < span class = "p" > :< / span >
< span class = "w" > < / span > < span class = "nt" > image< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ghcr.io/docker-mailserver/docker-mailserver:latest< / span >
< span class = "w" > < / span > < span class = "nt" > container_name< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > mailserver< / span >
< span class = "w" > < / span > < span class = "c1" > # Provide the FQDN of your mail server here (Your DNS MX record should point to this value)< / span >
< span class = "w" > < / span > < span class = "nt" > hostname< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > mail.example.com< / span >
< span class = "w" > < / span > < span class = "nt" > ports< / span > < span class = "p" > :< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "s" > " 25:25" < / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "s" > " 465:465" < / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "s" > " 587:587" < / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "s" > " 993:993" < / span >
< span class = "w" > < / span > < span class = "nt" > volumes< / span > < span class = "p" > :< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ./docker-data/dms/mail-data/:/var/mail/< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ./docker-data/dms/mail-state/:/var/mail-state/< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ./docker-data/dms/mail-logs/:/var/log/mail/< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ./docker-data/dms/config/:/tmp/docker-mailserver/< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > /etc/localtime:/etc/localtime:ro< / span >
< span class = "w" > < / span > < span class = "nt" > environment< / span > < span class = "p" > :< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ACCOUNT_PROVISIONER=LDAP< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_SERVER_HOST=ldap< / span > < span class = "w" > < / span > < span class = "c1" > # your ldap container/IP/ServerName< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_SEARCH_BASE=ou=people,dc=localhost,dc=localdomain< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_BIND_DN=cn=admin,dc=localhost,dc=localdomain< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_BIND_PW=admin< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_QUERY_FILTER_USER=(& (mail=%s)(mailEnabled=TRUE))< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_QUERY_FILTER_GROUP=(& (mailGroupMember=%s)(mailEnabled=TRUE))< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_QUERY_FILTER_ALIAS=(|(& (mailAlias=%s)(objectClass=PostfixBookMailForward))(& (mailAlias=%s)(objectClass=PostfixBookMailAccount)(mailEnabled=TRUE)))< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_QUERY_FILTER_DOMAIN=(|(& (mail=*@%s)(objectClass=PostfixBookMailAccount)(mailEnabled=TRUE))(& (mailGroupMember=*@%s)(objectClass=PostfixBookMailAccount)(mailEnabled=TRUE))(& (mailalias=*@%s)(objectClass=PostfixBookMailForward)))< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > DOVECOT_PASS_FILTER=(& (objectClass=PostfixBookMailAccount)(uniqueIdentifier=%n))< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > DOVECOT_USER_FILTER=(& (objectClass=PostfixBookMailAccount)(uniqueIdentifier=%n))< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ENABLE_SASLAUTHD=1< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > SASLAUTHD_MECHANISMS=ldap< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > SASLAUTHD_LDAP_SERVER=ldap< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > SASLAUTHD_LDAP_BIND_DN=cn=admin,dc=localhost,dc=localdomain< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > SASLAUTHD_LDAP_PASSWORD=admin< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > SASLAUTHD_LDAP_SEARCH_BASE=ou=people,dc=localhost,dc=localdomain< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > SASLAUTHD_LDAP_FILTER=(& (objectClass=PostfixBookMailAccount)(uniqueIdentifier=%U))< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > POSTMASTER_ADDRESS=postmaster@localhost.localdomain< / span >
< span class = "w" > < / span > < span class = "nt" > restart< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > always< / span >
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< / code > < / pre > < / div >
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< h2 id = "using-dms-as-a-local-mail-relay-for-containers" > < a class = "toclink" href = "#using-dms-as-a-local-mail-relay-for-containers" > Using DMS as a local mail relay for containers< / a > < / h2 >
< div class = "admonition info" >
< p class = "admonition-title" > Info< / p >
< p > This was originally a community contributed guide. Please let us know via a Github Issue if you're having any difficulty following the guide so that we can update it.< / p >
< / div >
< p > This guide is focused on only using < a href = "../../../config/security/understanding-the-ports/" > SMTP ports (not POP3 and IMAP)< / a > with the intent to relay mail received from another service to an external email address (eg: < code > user@gmail.com< / code > ). It is not intended for mailbox storage of real users.< / p >
< p > In this setup < code > docker-mailserver< / code > is not intended to receive email from the outside world, so no anti-spam or anti-virus software is needed, making the service lighter to run.< / p >
< div class = "admonition tip" >
< p class = "admonition-title" > < code > setup< / code > < / p >
< p > The < code > setup< / code > command used below is to be < a href = "../../../usage/#get-up-and-running" > run inside the container< / a > .< / p >
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< / div >
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< div class = "admonition warning" >
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< p class = "admonition-title" > Open Relays< / p >
< p > Adding the docker network's gateway to the list of trusted hosts (< em > eg: using the < code > network< / code > or < code > connected-networks< / code > option< / em > ), can create an < a href = "https://en.wikipedia.org/wiki/Open_mail_relay" > < strong > open relay< / strong > < / a > . For instance < a href = "https://github.com/docker-mailserver/docker-mailserver/issues/1405#issuecomment-590106498" > if IPv6 is enabled on the host machine, but not in Docker< / a > .< / p >
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< / div >
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< ol >
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< li >
< p > Create the file < code > docker-compose.yml< / code > with a content like this:< / p >
< div class = "admonition example" >
< p class = "admonition-title" > Example< / p >
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< div class = "highlight" > < pre > < span > < / span > < code > < span class = "nt" > services< / span > < span class = "p" > :< / span >
< span class = "w" > < / span > < span class = "nt" > mailserver< / span > < span class = "p" > :< / span >
< span class = "w" > < / span > < span class = "nt" > image< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > docker.io/mailserver/docker-mailserver:latest< / span >
< span class = "w" > < / span > < span class = "nt" > container_name< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > mailserver< / span >
< span class = "w" > < / span > < span class = "c1" > # Provide the FQDN of your mail server here (Your DNS MX record should point to this value)< / span >
< span class = "w" > < / span > < span class = "nt" > hostname< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > mail.example.com< / span >
< span class = "w" > < / span > < span class = "nt" > ports< / span > < span class = "p" > :< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "s" > " 25:25" < / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "s" > " 587:587" < / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "s" > " 465:465" < / span >
< span class = "w" > < / span > < span class = "nt" > volumes< / span > < span class = "p" > :< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ./docker-data/dms/mail-data/:/var/mail/< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ./docker-data/dms/mail-state/:/var/mail-state/< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ./docker-data/dms/mail-logs/:/var/log/mail/< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ./docker-data/dms/config/:/tmp/docker-mailserver/< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > /etc/localtime:/etc/localtime:ro< / span >
< span class = "w" > < / span > < span class = "nt" > environment< / span > < span class = "p" > :< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > ENABLE_FAIL2BAN=1< / span >
< span class = "w" > < / span > < span class = "c1" > # Using letsencrypt for SSL/TLS certificates:< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > SSL_TYPE=letsencrypt< / span >
< span class = "w" > < / span > < span class = "c1" > # Allow sending emails from other docker containers:< / span >
< span class = "w" > < / span > < span class = "c1" > # Beware creating an Open Relay: https://docker-mailserver.github.io/docker-mailserver/latest/config/environment/#permit_docker< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > PERMIT_DOCKER=network< / span >
< span class = "w" > < / span > < span class = "c1" > # You may want to enable this: https://docker-mailserver.github.io/docker-mailserver/latest/config/environment/#spoof_protection< / span >
< span class = "w" > < / span > < span class = "c1" > # See step 6 below, which demonstrates setup with enabled/disabled SPOOF_PROTECTION:< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > SPOOF_PROTECTION=0< / span >
< span class = "w" > < / span > < span class = "nt" > cap_add< / span > < span class = "p" > :< / span >
< span class = "w" > < / span > < span class = "p p-Indicator" > -< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > NET_ADMIN< / span > < span class = "w" > < / span > < span class = "c1" > # For Fail2Ban to work< / span >
< span class = "w" > < / span > < span class = "nt" > restart< / span > < span class = "p" > :< / span > < span class = "w" > < / span > < span class = "l l-Scalar l-Scalar-Plain" > always< / span >
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< / code > < / pre > < / div >
< / div >
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< p > The docs have a detailed page on < a href = "../../../config/environment/" > Environment Variables< / a > for reference.< / p >
< details class = "tip" >
< summary > Firewalled ports< / summary >
< p > If you have a firewall running, you may need to open ports < code > 25< / code > , < code > 587< / code > and < code > 465< / code > .< / p >
< p > For example, with the firewall < code > ufw< / code > , run:< / p >
< div class = "highlight" > < pre > < span > < / span > < code > ufw< span class = "w" > < / span > allow< span class = "w" > < / span > < span class = "m" > 25< / span >
ufw< span class = "w" > < / span > allow< span class = "w" > < / span > < span class = "m" > 587< / span >
ufw< span class = "w" > < / span > allow< span class = "w" > < / span > < span class = "m" > 465< / span >
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< / code > < / pre > < / div >
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< p > < strong > Caution:< / strong > This may < a href = "https://github.com/docker-mailserver/docker-mailserver/issues/3151" > not be sound advice< / a > .< / p >
< / details >
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< / li >
< li >
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< p > Configure your DNS service to use an MX record for the < em > hostname< / em > (eg: < code > mail< / code > ) you configured in the previous step and add the < a href = "../../../config/best-practices/spf/" > SPF< / a > TXT record.< / p >
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< div class = "admonition tip" >
< p class = "admonition-title" > If you manually manage the DNS zone file for the domain< / p >
< p > It would look something like this:< / p >
< div class = "highlight" > < pre > < span > < / span > < code > $ORIGIN example.com
@ IN A 10.11.12.13
mail IN A 10.11.12.13
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; mail-server for example.com
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@ IN MX 10 mail.example.com.
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; Add SPF record
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@ IN TXT " v=spf1 mx -all"
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< / code > < / pre > < / div >
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< p > Then don't forget to change the < code > SOA< / code > serial number, and to restart the service.< / p >
< / div >
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< / li >
< li >
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< p > < a href = "../../../config/best-practices/dkim/" > Generate DKIM keys< / a > for your domain via < code > setup config dkim< / code > .< / p >
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< p > Copy the content of the file < code > docker-data/dms/config/opendkim/keys/example.com/mail.txt< / code > and add it to your DNS records as a TXT like SPF was handled above.< / p >
< p > I use < a href = "https://github.com/docker-scripts/bind9" > bind9< / a > for managing my domains, so I just paste it on < code > example.com.db< / code > :< / p >
< div class = "highlight" > < pre > < span > < / span > < code > mail._domainkey IN TXT ( " v=DKIM1; h=sha256; k=rsa; "
" p=MIIBIjANBgkqhkiG9w0BAQEFACAQ8AMIIBCgKCAQEAaH5KuPYPSF3Ppkt466BDMAFGOA4mgqn4oPjZ5BbFlYA9l5jU3bgzRj3l6/Q1n5a9lQs5fNZ7A/HtY0aMvs3nGE4oi+LTejt1jblMhV/OfJyRCunQBIGp0s8G9kIUBzyKJpDayk2+KJSJt/lxL9Iiy0DE5hIv62ZPP6AaTdHBAsJosLFeAzuLFHQ6USyQRojefqFQtgYqWQ2JiZQ3"
" iqq3bD/BVlwKRp5gH6TEYEmx8EBJUuDxrJhkWRUk2VDl1fqhVBy8A9O7Ah+85nMrlOHIFsTaYo9o6+cDJ6t1i6G1gu+bZD0d3/3bqGLPBQV9LyEL1Rona5V7TJBGg099NQkTz1IwIDAQAB" ) ; ----- DKIM key mail for example.com
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< / code > < / pre > < / div >
< / li >
< li >
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< p > Get an SSL certificate, < a href = "../../../config/security/ssl/#lets-encrypt-recommended" > we have a guide for you here< / a > (< em > Let's Encrypt< / em > is a popular service to get free SSL certificates).< / p >
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< / li >
< li >
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< p > Start < code > docker-mailserver< / code > and check the terminal output for any errors: < code > docker-compose up< / code > .< / p >
< / li >
< li >
< p > Create email accounts and aliases:< / p >
< div class = "admonition example" >
< p class = "admonition-title" > With < code > SPOOF_PROTECTION=0< / code > < / p >
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< div class = "highlight" > < pre > < span > < / span > < code > setup< span class = "w" > < / span > email< span class = "w" > < / span > add< span class = "w" > < / span > admin@example.com< span class = "w" > < / span > passwd123
setup< span class = "w" > < / span > email< span class = "w" > < / span > add< span class = "w" > < / span > info@example.com< span class = "w" > < / span > passwd123
setup< span class = "w" > < / span > < span class = "nb" > alias< / span > < span class = "w" > < / span > add< span class = "w" > < / span > admin@example.com< span class = "w" > < / span > external-account@gmail.com
setup< span class = "w" > < / span > < span class = "nb" > alias< / span > < span class = "w" > < / span > add< span class = "w" > < / span > info@example.com< span class = "w" > < / span > external-account@gmail.com
setup< span class = "w" > < / span > email< span class = "w" > < / span > list
setup< span class = "w" > < / span > < span class = "nb" > alias< / span > < span class = "w" > < / span > list
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< / code > < / pre > < / div >
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< p > Aliases make sure that any email that comes to these accounts is forwarded to your third-party email address (< code > external-account@gmail.com< / code > ), where they are retrieved (< em > eg: via third-party web or mobile app< / em > ), instead of connecting directly to < code > docker-mailserer< / code > with POP3 / IMAP.< / p >
< / div >
< div class = "admonition example" >
< p class = "admonition-title" > With < code > SPOOF_PROTECTION=1< / code > < / p >
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< div class = "highlight" > < pre > < span > < / span > < code > setup< span class = "w" > < / span > email< span class = "w" > < / span > add< span class = "w" > < / span > admin.gmail@example.com< span class = "w" > < / span > passwd123
setup< span class = "w" > < / span > email< span class = "w" > < / span > add< span class = "w" > < / span > info.gmail@example.com< span class = "w" > < / span > passwd123
setup< span class = "w" > < / span > < span class = "nb" > alias< / span > < span class = "w" > < / span > add< span class = "w" > < / span > admin@example.com< span class = "w" > < / span > admin.gmail@example.com
setup< span class = "w" > < / span > < span class = "nb" > alias< / span > < span class = "w" > < / span > add< span class = "w" > < / span > info@example.com< span class = "w" > < / span > info.gmail@example.com
setup< span class = "w" > < / span > < span class = "nb" > alias< / span > < span class = "w" > < / span > add< span class = "w" > < / span > admin.gmail@example.com< span class = "w" > < / span > external-account@gmail.com
setup< span class = "w" > < / span > < span class = "nb" > alias< / span > < span class = "w" > < / span > add< span class = "w" > < / span > info.gmail@example.com< span class = "w" > < / span > external-account@gmail.com
setup< span class = "w" > < / span > email< span class = "w" > < / span > list
setup< span class = "w" > < / span > < span class = "nb" > alias< / span > < span class = "w" > < / span > list
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< / code > < / pre > < / div >
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< p > This extra step is required to avoid the < code > 553 5.7.1 Sender address rejected: not owned by user< / code > error (< em > the accounts used for submitting mail to Gmail are < code > admin.gmail@example.com< / code > and < code > info.gmail@example.com< / code > < / em > )< / p >
< / div >
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< / li >
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< p > Send some test emails to these addresses and make other tests. Once everything is working well, stop the container with < code > ctrl+c< / code > and start it again as a daemon: < code > docker-compose up -d< / code > .< / p >
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