[CentOS] How to handel smtp to public servers - done

Emmanuel Noobadmin

centos.admin at gmail.com
Thu Jun 28 04:04:12 UTC 2012

On 6/27/12, Götz Reinicke <goetz.reinicke at filmakademie.de> wrote:
> Long story short: I advised the use of port 587 two hours ago.
> FYI since than I had 169 outgoing connections to port 20 and 1 to 587. :)

Seriously, just force them. I got so tired of one particular app/mail
server that keep getting blacklisted because of lazy client admin and
users, I sent them a notice that for emergency security reasons,
emails will only be accepted on port 587. Gave them one hour, then
closed 25.

Understandably people screamed for about another hour or so but all of
them ended up on 587 by the end of the day ;)

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