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47 lines
1.9 KiB
Markdown
47 lines
1.9 KiB
Markdown
# docker-mailserver with ssl
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There are multiple options to enable SSL:
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* using [letsencrypt](https://letsencrypt.org/)
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* using self-signed certificates with the provided tool
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## let's encrypt
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To enable Let's Encrypt on your mail server, you have to add en environment variable `DMS_SSL` with value `letsencrypt`.
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You also have to mount your `letsencrypt` folder to `/etc/letsencrypt`.
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TO BE FINISHED WHEN IT WILL BE TESTED
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## self signed certificates
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You can easily generate a self-signed SSL certificate by using the following command:
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docker run -ti --rm -v "$(pwd)"/postfix/ssl:/ssl -h mail.my-domain.com -t tvial/docker-mailserver generate-ssl-certificate
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# Press enter
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# Enter a password when needed
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# Fill information like Country, Organisation name
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# Fill "my-domain.com" as FQDN for CA, and "mail.my-domain.com" for the certificate.
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# They HAVE to be different, otherwise you'll get a `TXT_DB error number 2`
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# Don't fill extras
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# Enter same password when needed
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# Sign the certificate? [y/n]:y
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# 1 out of 1 certificate requests certified, commit? [y/n]y
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# will generate:
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# postfix/ssl/mail.my-domain.com-key.pem (used in postfix)
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# postfix/ssl/mail.my-domain.com-req.pem (only used to generate other files)
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# postfix/ssl/mail.my-domain.com-cert.pem (used in postfix)
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# postfix/ssl/mail.my-domain.com-combined.pem (used in courier)
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# postfix/ssl/demoCA/cacert.pem (certificate authority)
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Note that the certificate will be generate for the container `fqdn`, that is passed as `-h` argument.
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Check the following page for more information regarding [postfix and SSL/TLS configuration](http://www.mad-hacking.net/documentation/linux/applications/mail/using-ssl-tls-postfix-courier.xml).
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If a matching certificate (files listed above) is found in `postfix/ssl`, it will be automatically setup in postfix and courier-imap-ssl. You just have to place them in `postfix/ssl` folder.
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