Support for MTA Postfix (as an alternative to Sendmail) is the second most wanted feature for OpenEMM. Therefore, we will provide this feature finally!
However, we do not have deep experience with Postfix. Therefore, we are releasing the first release of OpenEMM 2015 R3 as early access (EA) version. It consists of OpenEMM 2015 R2, a few bugfixes and the option to use Postfix instead of Sendmail.
We kindly ask you for feedback in our support forum at http://openemm.agnitas.de/bugs-bug-fixes-releases-f5/topic3059.html, and we will include any suggestions for configuration improvements and fix any Postfix-related problem you may find for the upcoming GA release of OpenEMM 2015 R3.
The Install and Administration Guide has already been extended by instructions on how to enabling Postfix support. You will find the updated version 1.2 of the OpenEMM guide here:
Thank you for taking the time to help us improving OpenEMM!