[CentOS] [Off topic] sending mail from Comcast was: Sendmail not working

Sun Apr 19 19:14:38 UTC 2020
Jeffrey Walton <noloader at gmail.com>

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.