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@ -31,6 +31,9 @@ The following env variables need to be passed to the container:
* `SMTP_PASSWORD` Password of the SMTP user. * `SMTP_PASSWORD` Password of the SMTP user.
* `SERVER_HOSTNAME` Server hostname for the Postfix container. Emails will appear to come from the hostname's domain. * `SERVER_HOSTNAME` Server hostname for the Postfix container. Emails will appear to come from the hostname's domain.
The following env variable(s) are optional.
* `HEADER_TAG` This will add a header for tracking messages upstream. Helpful for spam filters. Will appear as "RelayTag: ${HEADER_TAG}" in the email headers.
To use this container from anywhere, the 25 port needs to be exposed to the docker host server: To use this container from anywhere, the 25 port needs to be exposed to the docker host server:
docker run -d --name postfix -p "25:25" \ docker run -d --name postfix -p "25:25" \