The following ports are exposed by this container image.
| Port | Description |
|---|---|
| 25 | SMTP port |
| 587 | Submission port |
The following environment variables can be used with this container.
| Variable | Description | Default value |
|---|---|---|
| FROM_HEADER | From header value | $(hostname -f) |
| POSTFIX_ADD_MYNETWORKS_STYLE | Trusted clients list style (host/subnet/class) | subnet |
| POSTFIX_BASIC_SPAM_PREVENTION | Spam prevention level (off/medium/hard) | medium |
| POSTFIX_MYHOSTNAME | Server hostname to expose | $(hostname -f) |
| POSTFIX_MYNETWORKS | Trusted clients list subnets (comma-separated) | |
| POSTFIX_RBL_HOSTS | Realtime Blackhole Lists hosts (comma-separated) | sbl.spamhaus.org, xbl.spamhaus.org, spam.sorbs.net |
| POSTFIX_RELAYHOST | Relay host name for external recipients | |
| POSTFIX_SMTP_TLS_CLIENT | Enable TLS client | yes |
| POSTFIX_SMTP_TLS_SERVER | Enable TLS server | no |
| POSTFIX_TLS_CERTFILE | PEM-encoded certificate file for TLS server | |
| POSTFIX_TLS_KEYFILE | PEM-encoded private key file for TLS server | |
| SMTPD_LISTEN_REMOTE | Listen to remote connections | yes |
| SMTPD_MILTERS | Milters list (comma-separated) |
The following container paths can be used to mount a dedicated volume or to customize configuration.
| Path | Description |
|---|---|
| /var/spool/postfix | Data directory |