[Gllug] SPAM - trying to block at SMTP level

[Tethys]

Rev Simon Rumble writes:

>Three minutes extra is such a drag?

In the eyes of management, yes. It may well be an uninformed opinion,
but that's what they believe. They expect email to arrive instantly,
and trying to sell them a solution with a deliberate builtin delay
will not go down well.

But I'm curious about where you get your 3 minute figure from. In my
experience, 15 or 30 minutes is far more common. Plus, of course, the
delay is entirely determined by the configuration of the remote mail
server. I've seen sites with a 2 hour delay.

Try explaining to the CEO why the mail from his lawyers with the latest
draft contract for $IMPORTANT_DEAL hasn't arrived because you rejected
it and are now waiting for the remote server to retry. No, you don't
know how long that will take, and it's dependent on how the lawyers
have configured their system. Yes, he could have had it by now, but you
thought it would be better to reject it the first time in case it was
spam...

Greylisting certainly has its place. Home email is one good example.
It's less convincing in a corporate environment, though.

Tet
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