On Fri, May 21, 2010 at 04:43:15PM -0400, Phil Howard wrote:
> > port 465 is for SMTP+SSL
> > this is DEPRECATED and has been for a long time
> >
> > port 587 is for SMTP+STARTTLS
> > this is the designated SMTP SUBMISSION port
> >
> > The submission port should always be used instead of port 465 unless you
> > must support older clients like Outlook Express and older versions of
> > Outlook that will only do SMTP+SSL over port 465.
>
> I don't want to use port 465 because it isn't an unassigned port
> (though even unassigned has a risk that it could become assigned later
> on).
You are making a mistake, "465" was once assigned to the deprecated
"smtps" service and remans widely used in that capacity.
> But I need to use SMTP over TLS/SSL. It's not due to a client,
> but instead, due to networking (tunnelled TCP connections). It seems
> my choice is between using 465 or using some unassigned arbitrary
> port. Maybe 60025?
Using ports in the "dynamic" range would be a really bad idea. Use
465.
--
Viktor.
P.S. Morgan Stanley is looking for a New York City based, Senior Unix
system/email administrator to architect and sustain our perimeter email
environment. If you are interested, please drop me a note.
