[Gllug] Configuring SPF to cope with secondary incoming mail servers

[Jason Clifford]

On Thu, 7 Dec 2006, David Damerell wrote:

> Can you guarantee that accepting email at a loose-policy secondary MX
> won't cause loss of legitimate mail to more aggressive post-delivery
> spam filtering? No? Then it comes down to what's more likely; and the
> issue I describe will affect you all the time, whereas incorrectly
> short retry times only affect you if your primary is down or
> unavailable (and for how long? Not that it doesn't happen, but I can't
> remember the last day-long ISP problem that affected me...)
> 
> Furthermore a site with a stupidly short retry is definitely broken
> and senders of email from broken systems are going to lose now and
> again no matter what we do.

What I can guarantee is that our users wont loose mail because of the 
stupidity of such senders.

As an ISP that's my job.

Jason
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