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.
The container also accepts the PORT
environment variable, to set the port the mail daemon will listen on inside the container. The default port is 25
.
To disable IPV6 you can set the DISABLE_IPV6
environment variable to any value.
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.
As generic SMTP Relay
You can also use any generic SMTP server with authentication as smarthost.
You need to set SMARTHOST_ADDRESS
, SMARTHOST_PORT
(connection parameters), SMARTHOST_USER
, SMARTHOST_PASSWORD
(authentication parameters), and SMARTHOST_ALIASES
: this is a list of aliases to puth auth data for authentication, semicolon separated.
Example:
* SMARTHOST_ADDRESS=mail.mysmtp.com
* SMARTHOST_PORT=587
* SMARTHOST_USER=myuser
* SMARTHOST_PASSWORD=secret
* SMARTHOST_ALIASES=*.mysmtp.com