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Docker Mailserver
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Advanced | LDAP Authentication
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docker-mailserver
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User Management
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User Management
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< a href = "../../best-practices/dkim/" class = "md-nav__link" >
DKIM
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../../best-practices/dmarc/" class = "md-nav__link" >
DMARC
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../../best-practices/spf/" class = "md-nav__link" >
SPF
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../../best-practices/autodiscover/" class = "md-nav__link" >
Auto-discovery
< / a >
< / li >
< / ul >
< / nav >
< / li >
< li class = "md-nav__item md-nav__item--nested" >
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< input class = "md-nav__toggle md-toggle" data-md-toggle = "__nav_3_5" data-md-state = "indeterminate" type = "checkbox" id = "__nav_3_5" checked >
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< label class = "md-nav__link" for = "__nav_3_5" >
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Security
< span class = "md-nav__icon md-icon" > < / span >
< / label >
< nav class = "md-nav" aria-label = "Security" data-md-level = "2" >
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< label class = "md-nav__title" for = "__nav_3_5" >
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< span class = "md-nav__icon md-icon" > < / span >
Security
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
< li class = "md-nav__item" >
< a href = "../../security/understanding-the-ports/" class = "md-nav__link" >
Understanding the Ports
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../../security/ssl/" class = "md-nav__link" >
SSL/TLS
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../../security/fail2ban/" class = "md-nav__link" >
Fail2Ban
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../../security/mail_crypt/" class = "md-nav__link" >
Mail Encryption
< / a >
< / li >
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< / ul >
< / nav >
< / li >
< li class = "md-nav__item md-nav__item--nested" >
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< input class = "md-nav__toggle md-toggle" data-md-toggle = "__nav_3_6" data-md-state = "indeterminate" type = "checkbox" id = "__nav_3_6" checked >
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< label class = "md-nav__link" for = "__nav_3_6" >
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Troubleshooting
< span class = "md-nav__icon md-icon" > < / span >
< / label >
< nav class = "md-nav" aria-label = "Troubleshooting" data-md-level = "2" >
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< label class = "md-nav__title" for = "__nav_3_6" >
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< span class = "md-nav__icon md-icon" > < / span >
Troubleshooting
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
< li class = "md-nav__item" >
< a href = "../../troubleshooting/debugging/" class = "md-nav__link" >
Debugging
< / a >
< / li >
< / ul >
< / nav >
< / li >
< li class = "md-nav__item" >
< a href = "../../pop3/" class = "md-nav__link" >
Mail Delivery with POP3
< / a >
< / li >
< li class = "md-nav__item md-nav__item--active md-nav__item--nested" >
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< input class = "md-nav__toggle md-toggle" data-md-toggle = "__nav_3_8" type = "checkbox" id = "__nav_3_8" checked >
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< label class = "md-nav__link" for = "__nav_3_8" >
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Advanced Configuration
< span class = "md-nav__icon md-icon" > < / span >
< / label >
< nav class = "md-nav" aria-label = "Advanced Configuration" data-md-level = "2" >
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< label class = "md-nav__title" for = "__nav_3_8" >
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< span class = "md-nav__icon md-icon" > < / span >
Advanced Configuration
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
< li class = "md-nav__item" >
< a href = "../optional-config/" class = "md-nav__link" >
Optional Configuration
< / a >
< / li >
< li class = "md-nav__item md-nav__item--nested" >
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< input class = "md-nav__toggle md-toggle" data-md-toggle = "__nav_3_8_2" data-md-state = "indeterminate" type = "checkbox" id = "__nav_3_8_2" checked >
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< label class = "md-nav__link" for = "__nav_3_8_2" >
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Maintenance
< span class = "md-nav__icon md-icon" > < / span >
< / label >
< nav class = "md-nav" aria-label = "Maintenance" data-md-level = "3" >
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< label class = "md-nav__title" for = "__nav_3_8_2" >
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< span class = "md-nav__icon md-icon" > < / span >
Maintenance
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
< li class = "md-nav__item" >
< a href = "../maintenance/update-and-cleanup/" class = "md-nav__link" >
Update and Cleanup
< / a >
< / li >
< / ul >
< / nav >
< / li >
< li class = "md-nav__item md-nav__item--nested" >
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< input class = "md-nav__toggle md-toggle" data-md-toggle = "__nav_3_8_3" data-md-state = "indeterminate" type = "checkbox" id = "__nav_3_8_3" checked >
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< label class = "md-nav__link" for = "__nav_3_8_3" >
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Override the Default Configs
< span class = "md-nav__icon md-icon" > < / span >
< / label >
< nav class = "md-nav" aria-label = "Override the Default Configs" data-md-level = "3" >
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< label class = "md-nav__title" for = "__nav_3_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 >
< li class = "md-nav__item" >
< a href = "../override-defaults/dovecot/" class = "md-nav__link" >
Dovecot
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../override-defaults/postfix/" class = "md-nav__link" >
Postfix
< / a >
< / li >
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< li class = "md-nav__item" >
< a href = "../override-defaults/user-patches/" class = "md-nav__link" >
Modifications via Script
< / a >
< / li >
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< / ul >
< / nav >
< / li >
< li class = "md-nav__item md-nav__item--active" >
< input class = "md-nav__toggle md-toggle" data-md-toggle = "toc" type = "checkbox" id = "__toc" >
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< label class = "md-nav__link md-nav__link--active" for = "__toc" >
LDAP Authentication
< span class = "md-nav__icon md-icon" > < / span >
< / label >
< a href = "./" class = "md-nav__link md-nav__link--active" >
LDAP Authentication
< / a >
< nav class = "md-nav md-nav--secondary" aria-label = "Table of contents" >
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< label class = "md-nav__title" for = "__toc" >
< span class = "md-nav__icon md-icon" > < / span >
Table of contents
< / label >
< ul class = "md-nav__list" data-md-component = "toc" data-md-scrollfix >
< li class = "md-nav__item" >
< a href = "#introduction" class = "md-nav__link" >
Introduction
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "#variables-to-control-provisioning-by-the-container" class = "md-nav__link" >
Variables to Control Provisioning by the Container
< / a >
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< nav class = "md-nav" aria-label = "Variables to Control Provisioning by the Container" >
< ul class = "md-nav__list" >
< li class = "md-nav__item" >
< a href = "#ldap_query_filter_" class = "md-nav__link" >
LDAP_QUERY_FILTER_*
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "#dovecot__filter-dovecot__attrs" class = "md-nav__link" >
DOVECOT_*_FILTER & DOVECOT_*_ATTRS
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "#dovecot_auth_bind" class = "md-nav__link" >
DOVECOT_AUTH_BIND
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "#saslauthd_ldap_filter" class = "md-nav__link" >
SASLAUTHD_LDAP_FILTER
< / a >
< / li >
< / ul >
< / nav >
< / li >
< li class = "md-nav__item" >
< a href = "#secure-connection-with-ldaps-or-starttls" class = "md-nav__link" >
Secure Connection with LDAPS or StartTLS
< / a >
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< / li >
< li class = "md-nav__item" >
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< a href = "#ldap-setup-examples" class = "md-nav__link" >
LDAP Setup Examples
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< / a >
< / li >
< / ul >
< / nav >
< / li >
< li class = "md-nav__item" >
< a href = "../mail-sieve/" class = "md-nav__link" >
Email Filtering with Sieve
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../mail-fetchmail/" class = "md-nav__link" >
Email Gathering with Fetchmail
< / a >
< / li >
< li class = "md-nav__item md-nav__item--nested" >
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< input class = "md-nav__toggle md-toggle" data-md-toggle = "__nav_3_8_7" data-md-state = "indeterminate" type = "checkbox" id = "__nav_3_8_7" checked >
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< label class = "md-nav__link" for = "__nav_3_8_7" >
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Email Forwarding
< span class = "md-nav__icon md-icon" > < / span >
< / label >
< nav class = "md-nav" aria-label = "Email Forwarding" data-md-level = "3" >
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< label class = "md-nav__title" for = "__nav_3_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 >
< li class = "md-nav__item" >
< a href = "../mail-forwarding/relay-hosts/" class = "md-nav__link" >
Relay Hosts
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../mail-forwarding/aws-ses/" class = "md-nav__link" >
AWS SES
< / a >
< / li >
< / ul >
< / nav >
< / li >
< li class = "md-nav__item" >
< a href = "../full-text-search/" class = "md-nav__link" >
Full-Text Search
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../kubernetes/" class = "md-nav__link" >
Kubernetes
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../ipv6/" class = "md-nav__link" >
IPv6
< / a >
< / li >
< / ul >
< / nav >
< / li >
< / ul >
< / nav >
< / li >
< li class = "md-nav__item md-nav__item--nested" >
< input class = "md-nav__toggle md-toggle" data-md-toggle = "__nav_4" data-md-state = "indeterminate" type = "checkbox" id = "__nav_4" checked >
< label class = "md-nav__link" for = "__nav_4" >
Examples
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< / label >
< nav class = "md-nav" aria-label = "Examples" data-md-level = "1" >
< label class = "md-nav__title" for = "__nav_4" >
< span class = "md-nav__icon md-icon" > < / span >
Examples
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
< li class = "md-nav__item md-nav__item--nested" >
< input class = "md-nav__toggle md-toggle" data-md-toggle = "__nav_4_1" data-md-state = "indeterminate" type = "checkbox" id = "__nav_4_1" checked >
< label class = "md-nav__link" for = "__nav_4_1" >
Tutorials
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< / label >
< nav class = "md-nav" aria-label = "Tutorials" data-md-level = "2" >
< label class = "md-nav__title" for = "__nav_4_1" >
< span class = "md-nav__icon md-icon" > < / span >
Tutorials
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
< li class = "md-nav__item" >
< a href = "../../../examples/tutorials/basic-installation/" class = "md-nav__link" >
Basic Installation
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../../../examples/tutorials/mailserver-behind-proxy/" class = "md-nav__link" >
Mailserver behind Proxy
< / a >
< / li >
< / ul >
< / nav >
< / li >
< li class = "md-nav__item md-nav__item--nested" >
< input class = "md-nav__toggle md-toggle" data-md-toggle = "__nav_4_2" data-md-state = "indeterminate" type = "checkbox" id = "__nav_4_2" checked >
< label class = "md-nav__link" for = "__nav_4_2" >
Use Cases
< span class = "md-nav__icon md-icon" > < / span >
< / label >
< nav class = "md-nav" aria-label = "Use Cases" data-md-level = "2" >
< label class = "md-nav__title" for = "__nav_4_2" >
< span class = "md-nav__icon md-icon" > < / span >
Use Cases
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
< li class = "md-nav__item" >
< a href = "../../../examples/uses-cases/forward-only-mailserver-with-ldap-authentication/" class = "md-nav__link" >
Forward-Only Mailserver with LDAP
< / a >
< / li >
< / ul >
< / nav >
< / li >
< / ul >
< / nav >
< / li >
< li class = "md-nav__item" >
< a href = "../../../faq/" class = "md-nav__link" >
FAQ
< / a >
< / li >
< li class = "md-nav__item md-nav__item--nested" >
< input class = "md-nav__toggle md-toggle" data-md-toggle = "__nav_6" data-md-state = "indeterminate" type = "checkbox" id = "__nav_6" checked >
< label class = "md-nav__link" for = "__nav_6" >
Contributing
< span class = "md-nav__icon md-icon" > < / span >
< / label >
< nav class = "md-nav" aria-label = "Contributing" data-md-level = "1" >
< label class = "md-nav__title" for = "__nav_6" >
< span class = "md-nav__icon md-icon" > < / span >
Contributing
< / label >
< ul class = "md-nav__list" data-md-scrollfix >
< li class = "md-nav__item" >
< a href = "../../../contributing/issues-and-pull-requests/" class = "md-nav__link" >
Issues and Pull Requests
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../../../contributing/coding-style/" class = "md-nav__link" >
Coding Style
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../../../contributing/tests/" class = "md-nav__link" >
Tests
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "../../../contributing/documentation/" class = "md-nav__link" >
Documentation
< / a >
< / li >
< / ul >
< / nav >
< / li >
< li class = "md-nav__item" >
< a href = "https://hub.docker.com/repository/docker/mailserver/docker-mailserver" class = "md-nav__link" >
DockerHub
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "https://github.com/orgs/docker-mailserver/packages/container/package/docker-mailserver" class = "md-nav__link" >
GHCR
< / a >
< / li >
< / ul >
< / nav >
< / div >
< / div >
< / div >
< div class = "md-sidebar md-sidebar--secondary" data-md-component = "sidebar" data-md-type = "toc" >
< div class = "md-sidebar__scrollwrap" >
< div class = "md-sidebar__inner" >
< nav class = "md-nav md-nav--secondary" aria-label = "Table of contents" >
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< label class = "md-nav__title" for = "__toc" >
< span class = "md-nav__icon md-icon" > < / span >
Table of contents
< / label >
< ul class = "md-nav__list" data-md-component = "toc" data-md-scrollfix >
< li class = "md-nav__item" >
< a href = "#introduction" class = "md-nav__link" >
Introduction
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "#variables-to-control-provisioning-by-the-container" class = "md-nav__link" >
Variables to Control Provisioning by the Container
< / a >
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< nav class = "md-nav" aria-label = "Variables to Control Provisioning by the Container" >
< ul class = "md-nav__list" >
< li class = "md-nav__item" >
< a href = "#ldap_query_filter_" class = "md-nav__link" >
LDAP_QUERY_FILTER_*
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "#dovecot__filter-dovecot__attrs" class = "md-nav__link" >
DOVECOT_*_FILTER & DOVECOT_*_ATTRS
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "#dovecot_auth_bind" class = "md-nav__link" >
DOVECOT_AUTH_BIND
< / a >
< / li >
< li class = "md-nav__item" >
< a href = "#saslauthd_ldap_filter" class = "md-nav__link" >
SASLAUTHD_LDAP_FILTER
< / a >
< / li >
< / ul >
< / nav >
< / li >
< li class = "md-nav__item" >
< a href = "#secure-connection-with-ldaps-or-starttls" class = "md-nav__link" >
Secure Connection with LDAPS or StartTLS
< / a >
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< / li >
< li class = "md-nav__item" >
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< a href = "#ldap-setup-examples" class = "md-nav__link" >
LDAP Setup Examples
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< / a >
< / li >
< / ul >
< / nav >
< / div >
< / div >
< / div >
< div class = "md-content" data-md-component = "content" >
< article class = "md-content__inner md-typeset" >
< a href = "https://github.com/docker-mailserver/docker-mailserver/edit/master/docs/content/config/advanced/auth-ldap.md" title = "Edit this page" class = "md-content__button md-icon" >
< svg xmlns = "http://www.w3.org/2000/svg" viewBox = "0 0 24 24" > < path d = "M20.71 7.04c.39-.39.39-1.04 0-1.41l-2.34-2.34c-.37-.39-1.02-.39-1.41 0l-1.84 1.83 3.75 3.75M3 17.25V21h3.75L17.81 9.93l-3.75-3.75L3 17.25z" / > < / svg >
< / a >
< h1 > LDAP Authentication< / h1 >
< h2 id = "introduction" > < a class = "toclink" href = "#introduction" > Introduction< / a > < / h2 >
< p > Getting started with ldap and this mailserver we need to take 3 parts in account:< / p >
< ul >
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< li > < code > postfix< / code > for incoming & outgoing email< / li >
< li > < code > dovecot< / code > for accessing mailboxes< / li >
< li > < code > saslauthd< / code > for SMTP authentication (this can also be delegated to dovecot)< / li >
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< / ul >
< h2 id = "variables-to-control-provisioning-by-the-container" > < a class = "toclink" href = "#variables-to-control-provisioning-by-the-container" > Variables to Control Provisioning by the Container< / a > < / h2 >
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< p > Have a look at < a href = "../../environment/" > the ENV page< / a > for information on the default values.< / p >
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< h3 id = "ldap_query_filter_" > < a class = "toclink" href = "#ldap_query_filter_" > < code > LDAP_QUERY_FILTER_*< / code > < / a > < / h3 >
< p > Those variables contain the LDAP lookup filters for postfix, using < code > %s< / code > as the placeholder for the domain or email address in question. This means that...< / p >
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< ul >
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< li > ...for incoming email, the domain must return an entry for the < code > DOMAIN< / code > filter (see < a href = "http://www.postfix.org/postconf.5.html#virtual_alias_domains" > < code > virtual_alias_domains< / code > < / a > ).< / li >
< li > ...for incoming email, the inboxes which receive the email are chosen by the < code > USER< / code > , < code > ALIAS< / code > and < code > GROUP< / code > filters.< ul >
< li > The < code > USER< / code > filter specifies personal mailboxes, for which only one should exist per address, for example < code > (mail=%s)< / code > (also see < a href = "http://www.postfix.org/postconf.5.html#virtual_mailbox_maps" > < code > virtual_mailbox_maps< / code > < / a > )< / li >
< li > The < code > ALIAS< / code > filter specifies aliases for mailboxes, using < a href = "http://www.postfix.org/postconf.5.html#virtual_alias_maps" > < code > virtual_alias_maps< / code > < / a > , for example < code > (mailAlias=%s)< / code > < / li >
< li > The < code > GROUP< / code > filter specifies the personal mailboxes in a group (for emails that multiple people shall receive), using < a href = "http://www.postfix.org/postconf.5.html#virtual_alias_maps" > < code > virtual_alias_maps< / code > < / a > , for example < code > (mailGroupMember=%s)< / code > < / li >
< li > Technically, there is no difference between < code > ALIAS< / code > and < code > GROUP< / code > , but ideally you should use < code > ALIAS< / code > for personal aliases for a singular person (like < code > ceo@example.org< / code > ) and < code > GROUP< / code > for multiple people (like < code > hr@example.org< / code > ).< / li >
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< / ul >
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< / li >
< li > ...for outgoing email, the sender address is put through the < code > SENDERS< / code > filter, and only if the authenticated user is one of the returned entries, the email can be sent.< ul >
< li > This only applies if < code > SPOOF_PROTECTION=1< / code > .< / li >
< li > If the < code > SENDERS< / code > filter is missing, the < code > USER< / code > , < code > ALIAS< / code > and < code > GROUP< / code > filters will be used in in a disjunction (OR).< / li >
< li > To for example allow users from the < code > admin< / code > group to spoof any sender email address, and to force everyone else to only use their personal mailbox address for outgoing email, you can use something like this: < code > (|(memberOf=cn=admin,*)(mail=%s))< / code > < / li >
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< / ul >
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< / li >
< / ul >
< details class = "example" open = "open" > < summary > Example< / summary > < p > A really simple < code > LDAP_QUERY_FILTER< / code > configuration, using only the < em > user filter< / em > and allowing only < code > admin@*< / code > to spoof any sender addresses.< / p >
< div class = "highlight" > < pre > < span > < / span > < code > < span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > ENABLE_LDAP=1< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_SERVER_HOST=ldap.example.org< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_SEARCH_BASE=dc=example,dc=org" < / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_BIND_DN=cn=admin,dc=example,dc=org< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_BIND_PW=mypassword< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > SPOOF_PROTECTION=1< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_QUERY_FILTER_DOMAIN=(mail=*@%s)< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_QUERY_FILTER_USER=(mail=%s)< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_QUERY_FILTER_ALIAS=(|)< / span > < span class = "c1" > # doesn' t match anything< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_QUERY_FILTER_GROUP=(|)< / span > < span class = "c1" > # doesn' t match anything< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_QUERY_FILTER_SENDERS=(|(mail=%s)(mail=admin@*))< / span >
< / code > < / pre > < / div >
< / details >
< h3 id = "dovecot__filter-dovecot__attrs" > < a class = "toclink" href = "#dovecot__filter-dovecot__attrs" > < code > DOVECOT_*_FILTER< / code > & < code > DOVECOT_*_ATTRS< / code > < / a > < / h3 >
< p > These variables specify the LDAP filters that dovecot uses to determine if a user can log in to their IMAP account, and which mailbox is responsible to receive email for a specific postfix user.< / p >
< p > This is split into the following two lookups, both using < code > %u< / code > as the placeholder for the full login name (< a href = "https://doc.dovecot.org/configuration_manual/config_file/config_variables/" > see dovecot documentation for a full list of placeholders< / a > ). Usually you only need to set < code > DOVECOT_USER_FILTER< / code > , in which case it will be used for both filters.< / p >
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< ul >
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< li > < code > DOVECOT_USER_FILTER< / code > is used to get the account details (uid, gid, home directory, quota, ...) of a user.< / li >
< li > < code > DOVECOT_PASS_FILTER< / code > is used to get the password information of the user, and is in pretty much all cases identical to < code > DOVECOT_USER_FILTER< / code > (which is the default behaviour if left away).< / li >
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< / ul >
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< p > If your directory doesn't have the < a href = "https://github.com/variablenix/ldap-mail-schema/blob/master/postfix-book.schema" > postfix-book schema< / a > installed, then you must change the internal attribute handling for dovecot. For this you have to change the < code > pass_attr< / code > and the < code > user_attr< / code > mapping, as shown in the example below:< / p >
< div class = "highlight" > < pre > < span > < / span > < code > < span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > DOVECOT_PASS_ATTRS=< YOUR_USER_IDENTIFIER_ATTRIBUTE> =user,< YOUR_USER_PASSWORD_ATTRIBUTE> =password< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > DOVECOT_USER_ATTRS=< YOUR_USER_HOME_DIRECTORY_ATTRIBUTE> =home,< YOUR_USER_MAILSTORE_ATTRIBUTE> =mail,< YOUR_USER_MAIL_UID_ATTRIBUTE> =uid,< YOUR_USER_MAIL_GID_ATTRIBUTE> =gid< / span >
< / code > < / pre > < / div >
< div class = "admonition note" >
< p class = "admonition-title" > Note< / p >
< p > For < code > DOVECOT_*_ATTRS< / code > , you can replace < code > ldapAttr=dovecotAttr< / code > with < code > =dovecotAttr=%{ldap:ldapAttr}< / code > for more flexibility, like for example < code > =home=/var/mail/%{ldap:uid}< / code > or just < code > =uid=5000< / code > .< / p >
< p > A list of dovecot attributes can be found < a href = "https://doc.dovecot.org/configuration_manual/authentication/user_databases_userdb/#authentication-user-database" > in the dovecot documentation< / a > .< / p >
< / div >
< details class = "example" open = "open" > < summary > Defaults< / summary > < div class = "highlight" > < pre > < span > < / span > < code > < span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > DOVECOT_USER_ATTRS=mailHomeDirectory=home,mailUidNumber=uid,mailGidNumber=gid,mailStorageDirectory=mail< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > DOVECOT_PASS_ATTRS=uniqueIdentifier=user,userPassword=password< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > DOVECOT_USER_FILTER=(& (objectClass=PostfixBookMailAccount)(uniqueIdentifier=%n))< / span >
< / code > < / pre > < / div >
< / details >
< details class = "example" open = "open" > < summary > Example< / summary > < p > Setup for a directory that has the < a href = "https://github.com/amery/qmail/blob/master/qmail.schema" > qmail-schema< / a > installed and uses < code > uid< / code > :< / p >
< div class = "highlight" > < pre > < span > < / span > < code > < span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > DOVECOT_PASS_ATTRS=uid=user,userPassword=password< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > DOVECOT_USER_ATTRS=homeDirectory=home,qmailUID=uid,qmailGID=gid,mailMessageStore=mail< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > DOVECOT_USER_FILTER=(& (objectClass=qmailUser)(uid=%u)(accountStatus=active))< / span >
< / code > < / pre > < / div >
< / details >
< p > The LDAP server configuration for dovecot will be taken mostly from postfix, other options can be found in < a href = "../../environment/" > the environment section in the docs< / a > .< / p >
< h3 id = "dovecot_auth_bind" > < a class = "toclink" href = "#dovecot_auth_bind" > < code > DOVECOT_AUTH_BIND< / code > < / a > < / h3 >
< p > Set this to < code > yes< / code > to enable authentication binds (< a href = "https://wiki.dovecot.org/AuthDatabase/LDAP/AuthBinds" > more details in the dovecot documentation< / a > ). Currently, only DN lookup is supported without further changes to the configuration files, so this is only useful when you want to bind as a readonly user without the permission to read passwords.< / p >
< h3 id = "saslauthd_ldap_filter" > < a class = "toclink" href = "#saslauthd_ldap_filter" > < code > SASLAUTHD_LDAP_FILTER< / code > < / a > < / h3 >
< p > This filter is used for < code > saslauthd< / code > , which is called by postfix when someone is authenticating through SMTP (assuming that < code > SASLAUTHD_MECHANISMS=ldap< / code > is being used). Note that you'll need to set up the LDAP server for saslauthd seperately from postfix.< / p >
< p > The filter variables are explained in detail < a href = "https://github.com/winlibs/cyrus-sasl/blob/master/saslauthd/LDAP_SASLAUTHD#L121" > in the < code > LDAP_SASLAUTHD< / code > file< / a > , but unfortunately, this method doesn't really support domains right now - that means that < code > %U< / code > is the only token that makes sense in this variable.< / p >
< div class = "admonition note" >
< p class = "admonition-title" > When to use this and how to avoid it< / p >
< p > Using a separate filter for SMTP authentication allows you to for example allow < code > noreply@example.org< / code > to send email, but not log in to IMAP or receive email: < code > (& (mail=%U@example.org)(|(memberOf=cn=email,*)(mail=noreply@example.org)))< / code > < / p >
< p > If you don't want to use a separate filter for SMTP authentication, you can set < code > SASLAUTHD_MECHANISMS=rimap< / code > and < code > SASLAUTHD_MECH_OPTIONS=127.0.0.1< / code > to authenticate against dovecot instead - this means that the < code > DOVECOT_USER_FILTER< / code > and < code > DOVECOT_PASS_FILTER< / code > will be used for SMTP authentication as well.< / p >
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< / div >
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< details class = "example" open = "open" > < summary > Configure LDAP with < code > saslauthd< / code > < / summary > < div class = "highlight" > < pre > < span > < / span > < code > < span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > ENABLE_SASLAUTHD=1< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > SASLAUTHD_MECHANISMS=ldap< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > SASLAUTHD_LDAP_FILTER=(mail=%U@example.org)< / span >
< / code > < / pre > < / div >
< / details >
< h2 id = "secure-connection-with-ldaps-or-starttls" > < a class = "toclink" href = "#secure-connection-with-ldaps-or-starttls" > Secure Connection with LDAPS or StartTLS< / a > < / h2 >
< p > To enable LDAPS, all you need to do is to add the protocol to < code > LDAP_SERVER_HOST< / code > , for example < code > ldaps://example.org:636< / code > .< / p >
< p > To enable LDAP over StartTLS (on port 389), you need to set the following environment variables instead (the < strong > protocol must not be < code > ldaps://< / code > < / strong > in this case!):< / p >
< div class = "highlight" > < pre > < span > < / span > < code > < span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_START_TLS=yes< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > DOVECOT_TLS=yes< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > SASLAUTHD_LDAP_START_TLS=yes< / span >
< / code > < / pre > < / div >
< h2 id = "ldap-setup-examples" > < a class = "toclink" href = "#ldap-setup-examples" > LDAP Setup Examples< / a > < / h2 >
< details class = "example" open = "open" > < summary > Basic Setup< / summary > < div class = "highlight" > < pre > < span > < / span > < code > < span class = "nt" > version< / span > < span class = "p" > :< / span > < span class = "s" > ' 2' < / span >
< span class = "nt" > services< / span > < span class = "p" > :< / span >
< span class = "nt" > mail< / span > < span class = "p" > :< / span >
< span class = "nt" > image< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > mailserver/docker-mailserver:latest< / span >
< span class = "nt" > hostname< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > mail< / span >
< span class = "nt" > domainname< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > example.org< / span >
< span class = "nt" > container_name< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > mail< / span >
< span class = "nt" > ports< / span > < span class = "p" > :< / span >
< span class = "p p-Indicator" > -< / span > < span class = "s" > " 25:25" < / span >
< span class = "p p-Indicator" > -< / span > < span class = "s" > " 143:143" < / span >
< span class = "p p-Indicator" > -< / span > < span class = "s" > " 587:587" < / span >
< span class = "p p-Indicator" > -< / span > < span class = "s" > " 993:993" < / span >
< span class = "nt" > volumes< / span > < span class = "p" > :< / span >
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< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > ./data/maildata:/var/mail< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > ./data/mailstate:/var/mail-state< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > ./data/maillogs:/var/log/mail< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > /etc/localtime:/etc/localtime:ro< / span >
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< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > ./config/:/tmp/docker-mailserver/< / span >
< span class = "nt" > environment< / span > < span class = "p" > :< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > ENABLE_SPAMASSASSIN=1< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > ENABLE_CLAMAV=1< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > ENABLE_FAIL2BAN=1< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > ENABLE_POSTGREY=1< / span >
< span class = "c1" > # > > > Postfix LDAP Integration< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > ENABLE_LDAP=1< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_SERVER_HOST=ldap.example.org< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_BIND_DN=cn=admin,ou=users,dc=example,dc=org< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_BIND_PW=mypassword< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_SEARCH_BASE=dc=example,dc=org< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_QUERY_FILTER_DOMAIN=(|(mail=*@%s)(mailAlias=*@%s)(mailGroupMember=*@%s))< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_QUERY_FILTER_USER=(& (objectClass=inetOrgPerson)(mail=%s))< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_QUERY_FILTER_ALIAS=(& (objectClass=inetOrgPerson)(mailAlias=%s))< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_QUERY_FILTER_GROUP=(& (objectClass=inetOrgPerson)(mailGroupMember=%s))< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_QUERY_FILTER_SENDERS=(& (objectClass=inetOrgPerson)(|(mail=%s)(mailAlias=%s)(mailGroupMember=%s)))< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > SPOOF_PROTECTION=1< / span >
< span class = "c1" > # < < < Postfix LDAP Integration< / span >
< span class = "c1" > # > > > Dovecot LDAP Integration< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > DOVECOT_USER_FILTER=(& (objectClass=inetOrgPerson)(mail=%u))< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > DOVECOT_PASS_ATTRS=uid=user,userPassword=password< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > DOVECOT_USER_ATTRS==home=/var/mail/%{ldap:uid},=mail=maildir:~/Maildir,uidNumber=uid,gidNumber=gid< / span >
< span class = "c1" > # < < < Dovecot LDAP Integration< / span >
< span class = "c1" > # > > > SASL LDAP Authentication< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > ENABLE_SASLAUTHD=1< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > SASLAUTHD_MECHANISMS=ldap< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > SASLAUTHD_LDAP_FILTER=(& (mail=%U@example.org)(objectClass=inetOrgPerson))< / span >
< span class = "c1" > # < < < SASL LDAP Authentication< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > ONE_DIR=1< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > DMS_DEBUG=0< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > SSL_TYPE=letsencrypt< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > PERMIT_DOCKER=host< / span >
< span class = "nt" > cap_add< / span > < span class = "p" > :< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > NET_ADMIN< / span >
< / code > < / pre > < / div >
< / details >
< details class = "example" > < summary > Kopano / Zarafa< / summary > < div class = "highlight" > < pre > < span > < / span > < code > < span class = "nt" > version< / span > < span class = "p" > :< / span > < span class = "s" > ' 2' < / span >
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< span class = "nt" > services< / span > < span class = "p" > :< / span >
< span class = "nt" > mail< / span > < span class = "p" > :< / span >
< span class = "nt" > image< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > mailserver/docker-mailserver:latest< / span >
< span class = "nt" > hostname< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > mail< / span >
< span class = "nt" > domainname< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > domain.com< / span >
< span class = "nt" > container_name< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > mail< / span >
< span class = "nt" > ports< / span > < span class = "p" > :< / span >
< span class = "p p-Indicator" > -< / span > < span class = "s" > " 25:25" < / span >
< span class = "p p-Indicator" > -< / span > < span class = "s" > " 143:143" < / span >
< span class = "p p-Indicator" > -< / span > < span class = "s" > " 587:587" < / span >
< span class = "p p-Indicator" > -< / span > < span class = "s" > " 993:993" < / span >
< span class = "nt" > volumes< / span > < span class = "p" > :< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > maildata:/var/mail< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > mailstate:/var/mail-state< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > ./config/:/tmp/docker-mailserver/< / span >
< span class = "nt" > environment< / span > < span class = "p" > :< / span >
< span class = "c1" > # We are not using dovecot here< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > SMTP_ONLY=1< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > ENABLE_SPAMASSASSIN=1< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > ENABLE_CLAMAV=1< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > ENABLE_FAIL2BAN=1< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > ENABLE_POSTGREY=1< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > SASLAUTHD_PASSWD=< / span >
< span class = "c1" > # > > > SASL Authentication< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > ENABLE_SASLAUTHD=1< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > SASLAUTHD_LDAP_FILTER=(& (sAMAccountName=%U)(objectClass=person))< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > SASLAUTHD_MECHANISMS=ldap< / span >
< span class = "c1" > # < < < SASL Authentication< / span >
< span class = "c1" > # > > > Postfix Ldap Integration< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > ENABLE_LDAP=1< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_SERVER_HOST=< yourLdapContainer/yourLdapServer> < / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_SEARCH_BASE=dc=mydomain,dc=loc< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_BIND_DN=cn=Administrator,cn=Users,dc=mydomain,dc=loc< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_BIND_PW=mypassword< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_QUERY_FILTER_USER=(& (objectClass=user)(mail=%s))< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_QUERY_FILTER_GROUP=(& (objectclass=group)(mail=%s))< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_QUERY_FILTER_ALIAS=(& (objectClass=user)(otherMailbox=%s))< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > LDAP_QUERY_FILTER_DOMAIN=(& (|(mail=*@%s)(mailalias=*@%s)(mailGroupMember=*@%s))(mailEnabled=TRUE))< / span >
< span class = "c1" > # < < < Postfix Ldap Integration< / span >
< span class = "c1" > # > > > Kopano Integration< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > ENABLE_POSTFIX_VIRTUAL_TRANSPORT=1< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > POSTFIX_DAGENT=lmtp:kopano:2003< / span >
< span class = "c1" > # < < < Kopano Integration< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > ONE_DIR=1< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > DMS_DEBUG=0< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > SSL_TYPE=letsencrypt< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > PERMIT_DOCKER=host< / span >
< span class = "nt" > cap_add< / span > < span class = "p" > :< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > NET_ADMIN< / span >
< span class = "nt" > volumes< / span > < span class = "p" > :< / span >
< span class = "nt" > maildata< / span > < span class = "p" > :< / span >
< span class = "nt" > driver< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > local< / span >
< span class = "nt" > mailstate< / span > < span class = "p" > :< / span >
< span class = "nt" > driver< / span > < span class = "p" > :< / span > < span class = "l l-Scalar l-Scalar-Plain" > local< / span >
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