postfix-users October 2010 archive
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postfix-users: Re: Posfix: deliver to spam folder analog of reje

Re: Posfix: deliver to spam folder analog of reject_rbl_client

From: Noel Butler <noel.butler_at_nospam>
Date: Fri Oct 29 2010 - 06:59:57 GMT

On Thu, 2010-10-28 at 09:40 -0400, Wietse Venema wrote:

> > > .........
> This illustrates what you get when blocking all mail from an ISP
> just because some customer sent some email that hit some spamtrap.

We do it here, I've done it for 5 years or so, little problems at all
given the remoteness of the addresses, the only way
for it to be tried is because of a spambot, therefore that IP =
miscreant, and frankly I don't want miscreants knocking our way, and not
many miscreants use their ISP's mail servers.

> Such an approach makes sense only if receiving one spam message is
> a bigger problem than losing a larger amount of legitimate email.

But how do you know its only " one " I'm sure if this IP in question was
only used by you then there is no doubt it would be wrongful listing,
however, majordomo is not the smartest kid of the block, hasn't been for
a decade if ever, someone with a grudge could easily fire away at it
causing it ending up where it is now.

Luckily the vast majority of IP's hitting spamtraps are end users/bots,
so it would normally be quite rare to have a real actual mail server
listed, however Gmail pushes this envelope to extreme, not so bad
recently, but in the past, it has had a reputation almost as bad as the
mid to late nineties AOL.