Remote User's SMTP relay authorization

[Kendrick Vargas]

On Mon, 15 Mar 2004, John Gibson wrote:

> I have a sales team which needs to be able to use a SMTP relay while "on
> the road".  There is a " TLS
> <http://www.aet.TU-Cottbus.DE/personen/jaenicke/postfix_tls/> patch by
> Lutz Jaenicke." to Postfix which seems like it might be a good solution.
>  The nice thing there is that by using CA user authentication, the
> *user* is identified before SMTP relays are allowed.  However, the
> number of  mail clients that can actually do this seem very limited
> (netscape, mozilla ?).

Ummm... if you're willing to forego SSL encryption (most SMTP traffic
flies unencrypted anyways), then regular SMTP AUTH should do the trick for
you. It does exactly what you mentioned, only without SSL. And just about
every modern email client I've seen allows for it (outlook, the entire
mozilla family & derivatives, etc). The only problem you might have with
"on the road" is that ISP's tend to block outbound port 25 access, and
rightly so, to avoid worm/virus/spam propagation. I got around that by
setting up an alternate SMTP port which is different from the default of
25 (like 1025, or 2025, etc..) which ONLY does SMTP AUTH relay.

> I would appreciate any recommendations or success stories which utilize
> Cyrus IMAP as the standalone mail server and also ways to allow SMTP
> relaying to *only* our valid, authenticated users.

works great. I do it from home :-)
			-peace

-- 
Let he who is without clue kiss my ass
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