Postfix Mail Relay
Contains:
- Postfix, running in a simple relay mode
- RSyslog
Processes are managed by supervisord, including cronjobs
The container provides a simple proxy relay for environments like Amazon VPC where you may have private servers with no Internet connection and therefore with no access to external mail relays (e.g. Amazon SES, SendGrid and others). You need to supply the container with your external mail relay address and credentials. The configuration is tested with Amazon SES.
Exports
- Postfix on
25
Variables
RELAY_HOST_NAME=relay.example.com
: A DNS name for this relay container (usually the same as the Docker's hostname)ACCEPTED_NETWORKS=192.168.0.0/16 172.16.0.0/12 10.0.0.0/8
: A network (or a list of networks) to accept mail fromEXT_RELAY_HOST=email-smtp.us-east-1.amazonaws.com
: External relay DNS nameEXT_RELAY_PORT=25
: External relay TCP portSMTP_LOGIN=
: Login to connect to the external relay (required, otherwise the container fails to start)SMTP_PASSWORD=
: Password to connect to the external relay (required, otherwise the container fails to start)USE_TLS=
: Remote require tls. Might be "yes" or "no". Default: no.TLS_VERIFY=
: Trust level for checking the remote side cert. (none, may, encrypt, dane, dane-only, fingerprint, verify, secure). Default: may.
Example
Launch Postfix container:
$ docker run -d -h relay.example.com --name="mailrelay" -e SMTP_LOGIN=myLogin -e SMTP_PASSWORD=myPassword -p 25:25 pioto/postfix-relay