Re: Alternate port for SMTP traffic

  On 02/24/2011 06:44 AM, Ian Eiloart wrote:
>
> It's absolutely normal, and even recommended, to set up SMTP access for
> clients on port 587 provided that you must require authentication for
> connections on that port. It's quite likely that your SMTP server supports
> authenticated connections on port 587.
>
> The service (SMTP on port 587) is called Message Submission Agent, and is
> required to bypass the blocks that many ISPs put on direct connections on
> port 25.
>
If I had my way here at UC Davis, our mail servers would be thus:

smtp.ucdavis.edu: port 587 (only)
mx.ucdavis.edu: port 25 (only)

Alas, the legacy of previous decade practice means I have to
allow port 25 on my SMTP pool systems.  For on-campus
we allow relaying on that port, for off-campus you must
authenticate.


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