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Re:How to Run Your Own Mail Server (2017) by ams6110 on Friday January 26, 2018 @10:34AM (#16239902)
OpenBSD's smtpd has worked well for me. It's also available in a portable version.

https://www.opensmtpd.org/

Configuration is one file, very simple. It won't do everything a sendmail does, but it's never had me pulling my hair out.

Re:How to Run Your Own Mail Server (2017) by DrPhish on Friday January 26, 2018 @02:10PM (#16241992)
I also am using opensmtpd, and have been for years. Even setting up starttls encryption and a DKIM proxy were simple. I have never had an issue with accidentally setting it up as an open relay or anything else that would place me on a blacklist.
Re:How to Run Your Own Mail Server (2017) by dbolgheroni on Friday January 26, 2018 @05:25PM (#16243414)
Of course, no MTA is as easy as creating a GMail account, but OpenBSD's smtpd is a lot clearer than any of the alternatives.