freakybytes/nullmailer repository overview

⁠nullmailer Docker

This image contains nullmailer on Alpine Linux. The compile and build instructions were taken from vimagick/dockerfiles⁠

Nullmailer is a sendmail/qmail/etc replacement MTA for hosts which relay to a fixed set of smart relays. It is designed to be simple to configure, secure, and easily extendable.

⁠Use the image

This image can be simply configured using a few Environment variables

• NULLMAILER_DEFAULT_DOMAIN: Defines the default domain, i.e. the domain of the relay. Defaults to localhost.lan
• NULLMAILER_HELO: Changes the host to be send during the HELO command. Defaults to NULLMAILER_DEFAULT_DOMAIN
• NULLMAILER_PAUSETIME: Time in seconds to wait between send attempts. Defaults to 30
• NULLMAILER_REMOTE: Remote Smart-MTAs. Defaults to the dockerhost with port 25.
  cf. the nullmailer-send.8⁠ for the format and further options

⁠Build the image

Simply run docker build -t nullmailer .