Docker-SMTP

This is a SMTP docker container for sending emails. You can also relay emails to gmail and amazon SES.

Environment variables

The container accepts RELAY_NETWORKS environment variable which MUST start with : e.g :192.168.0.0/24 or :192.168.0.0/24:10.0.0.0/16. The container accepts KEY_PATH and CERTIFICATE_PATH environment variable that if provided will enable TLS support. The paths must be to the key and certificate file on a exposed volume. The keys will be copied into the container location. The container accepts MAILNAME environment variable which will set the outgoing mail hostname

Below are scenarios for using this container

As SMTP Server

You don't need to specify any environment variable to get this up.

As a Secondary SMTP Server

Specify 'RELAY_DOMAINS' to setup what domains should be accepted to forward to lower distance MX server.

Format is <domain1> : <domain2> : <domain3> etc

As Gmail Relay

You need to set the GMAIL_USER and GMAIL_PASSWORD to be able to use it.

As Amazon SES Relay

You need to set the SES_USER and SES_PASSWORD to be able to use it.
You can override the SES region by setting SES_REGION as well.