Creating a "mail gateway"

[Robert Brockway]

On Tue, 17 Jun 2008, Ian Petersen wrote:

> Regarding postgrey, he's got some kind of spam filter in place.  Don't
> know anything about it except that it integrates with Exchange.  As
> for receiving mail when Rogers is down, won't the sending MTA queue
> things just as well as Postfix could?

Yes, but[1], you have no control over how long the remote MTA will queue 
the mail whereas you can control how long your MTA queues mail.

Mail bounced by a remote MTA is silent to you too - you don't ever know 
someone tried to email you.  Even if you MTA was forced to start rejecting 
mail (disk full or whatever) you have logs of the event (unless that 
filesystem was full too of course).

IMHO email is too important to business these days to trust remote MTAs to 
queue the mail and deliver it in some rational manner following an outage.

Rob

[1] There's always a "but" isn't there :)

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"With sufficient thrust, pigs fly just fine..."
 	-- RFC 1925 "The Twelve Networking Truths"
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