On Sun, Apr 19, 2020 at 3:10 PM S.Bob <sbob at quadratum-braccas.com> wrote: > > OK, I've fired up a new VM, new CentOS 7 install, now I get this: > > # rpm -qf `which sendmail` > postfix-2.10.1-7.el7.x86_64 > > Can you point me to how to set this up properly? Note that I won the > psalm19pix.com domain, it's hosted at fastmail.com, and as far as I know > requires SSL. Can I setup sendmail to use this as it's SMPT connection? IIRC properly, many mail services don't accept over port 25 any longer. It is due to a combination of spam and plain text data. Also see https://en.wikipedia.org/wiki/Message_submission_agent. You have to use port 587. Jeff