Sending e-mail on the UTN servers is done using the Postfix software package. The software has been setup on the servers in such a way that one can locally simply connect to localhost on port 25 using the SMTP protocol. In the current configuration the servers only send e-mail; mails send to any domain are handled by Google Apps.

The installation of Postfix on the servers is done using an Ansible role. For more information about the installation, see the Ansible repository.


In 2018, many emails failed to get delivered. This was solved by using the SMTP relay provided by Google Suite. This required some extra setup on the union’s Google Suite. The setup can be found at the Admin page for the Google Suite under Apps -> Gsuite -> Gmail -> Advanced Settings. On this site you should find SMTP-relay service under forwarding.