Re: Alternative to port 25 for SMTP submission.

[Dan Ritter <dsr@randomstring.org>]

peter@easthope.ca wrote: 
> Until exim connects to the smarthost with implicit TLS, I think of
> having a non-TLS MUA send messages to the smarthost directly through
> the stunnel tunnel.  As mentioned a few days ago, the analogue for
> POP3 works with no difficulty.
> 
> If I try to remove exim, the system will complain about absence of
> MTA.  So I think of leaving exim installed. It uses port 25 for local
> submission.
> 
> What port is suggested for submission through the tunnel? Any unused
> port in the dynamic, private and ephemeral range? Eg. 49160?

You can use any port you'd like, but 465 and 587 are already
allocated for similar purposes -- 465 should have TLS turned on,
and 587 should be plaintext with StartTLS support if possible.

-dsr-