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Docker Mailserver
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Advanced | Email Gathering with Fetchmail
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User Management
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Best Practices
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DKIM
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DMARC
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SPF
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Security
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< 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 > Email Gathering with Fetchmail< / h1 >
< p > To enable the < a href = "https://www.fetchmail.info" > fetchmail< / a > service to retrieve e-mails set the environment variable < code > ENABLE_FETCHMAIL< / code > to < code > 1< / code > . Your < code > docker-compose.yml< / code > file should look like following snippet:< / p >
< div class = "highlight" > < pre > < span > < / span > < code > < span class = "nt" > environment< / span > < span class = "p" > :< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > ENABLE_FETCHMAIL=1< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > FETCHMAIL_POLL=300< / span >
< / code > < / pre > < / div >
< p > Generate a file called < code > fetchmail.cf< / code > and place it in the < code > config< / code > folder. Your < code > docker-mailserver< / code > folder should look like this example:< / p >
< div class = "highlight" > < pre > < span > < / span > < code > ├── config
│ ├── dovecot.cf
│ ├── fetchmail.cf
│ ├── postfix-accounts.cf
│ └── postfix-virtual.cf
├── docker-compose.yml
└── README.md
< / code > < / pre > < / div >
< h2 id = "configuration" > < a class = "toclink" href = "#configuration" > Configuration< / a > < / h2 >
< p > A detailed description of the configuration options can be found in the < a href = "https://www.fetchmail.info/fetchmail-man.html" > online version of the manual page< / a > .< / p >
< h3 id = "imap-configuration" > < a class = "toclink" href = "#imap-configuration" > IMAP Configuration< / a > < / h3 >
< div class = "admonition example" >
< p class = "admonition-title" > Example< / p >
< div class = "highlight" > < pre > < span > < / span > < code > poll ' imap.example.com' proto imap
user ' username'
pass ' secret'
is ' user1@domain.tld'
ssl
< / code > < / pre > < / div >
< / div >
< h3 id = "pop3-configuration" > < a class = "toclink" href = "#pop3-configuration" > POP3 Configuration< / a > < / h3 >
< div class = "admonition example" >
< p class = "admonition-title" > Example< / p >
< div class = "highlight" > < pre > < span > < / span > < code > poll ' pop3.example.com' proto pop3
user ' username'
pass ' secret'
is ' user2@domain.tld'
ssl
< / code > < / pre > < / div >
< / div >
< div class = "admonition caution" >
< p class = "admonition-title" > Caution< / p >
< p > Don’ < code > is 'user1@domain.tld'< / code > . After < code > is< / code > you have to specify one email address from the configuration file < code > config/postfix-accounts.cf< / code > .< / p >
< / div >
< p > More details how to configure fetchmail can be found in the < a href = "https://www.fetchmail.info/fetchmail-man.html#31" > fetchmail man page in the chapter “The run control file”< / a > .< / p >
< h3 id = "polling-interval" > < a class = "toclink" href = "#polling-interval" > Polling Interval< / a > < / h3 >
< p > By default the fetchmail service searches every 5 minutes for new mails on your external mail accounts. You can override this default value by changing the ENV variable < code > FETCHMAIL_POLL< / code > :< / p >
< div class = "highlight" > < pre > < span > < / span > < code > < span class = "nt" > environment< / span > < span class = "p" > :< / span >
< span class = "p p-Indicator" > -< / span > < span class = "l l-Scalar l-Scalar-Plain" > FETCHMAIL_POLL=60< / span >
< / code > < / pre > < / div >
< p > You must specify a numeric argument which is a polling interval in seconds. The example above polls every minute for new mails.< / p >
< h2 id = "debugging" > < a class = "toclink" href = "#debugging" > Debugging< / a > < / h2 >
< p > To debug your < code > fetchmail.cf< / code > configuration run this command:< / p >
< div class = "highlight" > < pre > < span > < / span > < code > ./setup.sh debug fetchmail
< / code > < / pre > < / div >
< p > For more informations about the configuration script < code > setup.sh< / code > < a href = "../../setup.sh/" > read the corresponding docs< / a > .< / p >
< p > Here a sample output of < code > ./setup.sh debug fetchmail< / code > :< / p >
< div class = "highlight" > < pre > < span > < / span > < code > < span class = "go" > fetchmail: 6.3.26 querying outlook.office365.com (protocol POP3) at Mon Aug 29 22:11:09 2016: poll started< / span >
< span class = "go" > Trying to connect to 132.245.48.18/995...connected.< / span >
< span class = "go" > fetchmail: Server certificate:< / span >
< span class = "go" > fetchmail: Issuer Organization: Microsoft Corporation< / span >
< span class = "go" > fetchmail: Issuer CommonName: Microsoft IT SSL SHA2< / span >
< span class = "go" > fetchmail: Subject CommonName: outlook.com< / span >
< span class = "go" > fetchmail: Subject Alternative Name: outlook.com< / span >
< span class = "go" > fetchmail: Subject Alternative Name: *.outlook.com< / span >
< span class = "go" > fetchmail: Subject Alternative Name: office365.com< / span >
< span class = "go" > fetchmail: Subject Alternative Name: *.office365.com< / span >
< span class = "go" > fetchmail: Subject Alternative Name: *.live.com< / span >
< span class = "go" > fetchmail: Subject Alternative Name: *.internal.outlook.com< / span >
< span class = "go" > fetchmail: Subject Alternative Name: *.outlook.office365.com< / span >
< span class = "go" > fetchmail: Subject Alternative Name: outlook.office.com< / span >
< span class = "go" > fetchmail: Subject Alternative Name: attachment.outlook.office.net< / span >
< span class = "go" > fetchmail: Subject Alternative Name: attachment.outlook.officeppe.net< / span >
< span class = "go" > fetchmail: Subject Alternative Name: *.office.com< / span >
< span class = "go" > fetchmail: outlook.office365.com key fingerprint: 3A:A4:58:42:56:CD:BD:11:19:5B:CF:1E:85:16:8E:4D< / span >
< span class = "go" > fetchmail: POP3< +OK The Microsoft Exchange POP3 service is ready. [SABFADEAUABSADAAMQBDAEEAMAAwADAANwAuAGUAdQByAHAAcgBkADAAMQAuAHAAcgBvAGQALgBlAHgAYwBoAGEAbgBnAGUAbABhAGIAcwAuAGMAbwBtAA==]< / span >
< span class = "go" > fetchmail: POP3> CAPA< / span >
< span class = "go" > fetchmail: POP3< +OK< / span >
< span class = "go" > fetchmail: POP3< TOP< / span >
< span class = "go" > fetchmail: POP3< UIDL< / span >
< span class = "go" > fetchmail: POP3< SASL PLAIN< / span >
< span class = "go" > fetchmail: POP3< USER< / span >
< span class = "go" > fetchmail: POP3< .< / span >
< span class = "go" > fetchmail: POP3> USER user1@outlook.com< / span >
< span class = "go" > fetchmail: POP3< +OK< / span >
< span class = "go" > fetchmail: POP3> PASS *< / span >
< span class = "go" > fetchmail: POP3< +OK User successfully logged on.< / span >
< span class = "go" > fetchmail: POP3> STAT< / span >
< span class = "go" > fetchmail: POP3< +OK 0 0< / span >
< span class = "go" > fetchmail: No mail for user1@outlook.com at outlook.office365.com< / span >
< span class = "go" > fetchmail: POP3> QUIT< / span >
< span class = "go" > fetchmail: POP3< +OK Microsoft Exchange Server 2016 POP3 server signing off.< / span >
< span class = "go" > fetchmail: 6.3.26 querying outlook.office365.com (protocol POP3) at Mon Aug 29 22:11:11 2016: poll completed< / span >
< span class = "go" > fetchmail: normal termination, status 1< / span >
< / code > < / pre > < / div >
< / article >
< / div >
< / div >
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2021-04-08 10:28:06 +00:00
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