Run postfix with smtp authentication (sasldb) in a docker container. TLS and OpenDKIM support are optional.
Based on Alpine
- Docker 1.0
-
Build image
$ sudo docker pull catatnight/postfix
-
Create postfix container with smtp authentication
$ sudo docker run -p 25:25 \ -e maildomain=mail.example.com -e smtp_user=user:pwd \ --name postfix -d catatnight/postfix # Set multiple user credentials: -e smtp_user=user1:pwd1,user2:pwd2,...,userN:pwdN
-
Enable OpenDKIM: save your domain key
.private
in/path/to/domainkeys
$ sudo docker run -p 25:25 \ -e maildomain=mail.example.com -e smtp_user=user:pwd \ -v /path/to/domainkeys:/etc/opendkim/domainkeys \ --name postfix -d catatnight/postfix
-
Enable TLS(587): save your SSL certificates
.key
and.crt
to/path/to/certs
$ sudo docker run -p 587:587 \ -e maildomain=mail.example.com -e smtp_user=user:pwd \ -v /path/to/certs:/etc/postfix/certs \ --name postfix -d catatnight/postfix
Copy/paste and adapt this file for your configuration :
docker-compose.yml.dist
=>docker-compose.yml
You can launch these command to do this :
make install
- Login credential should be set to (
[email protected]
,password
) in Smtp Client - You can assign the port of MTA on the host machine to one other than 25 (postfix how-to)
- Read the reference below to find out how to generate domain keys and add public key to the domain's DNS records