exim-users  

Re: [exim] How to solve the problem with multiple sender IPs and (selective) greylisting?!

Jakob Hirsch
Tue, 09 Mar 2010 02:04:35 -0800

l...@lena.kiev.ua, 2010-03-08 16:58:

>> I'd suggest to use ${mask:<IP address>/<bit count>} instead. regex is
>> not always the best solution.
> In this case regex gives 5 bytes shorter result (without .0/24 at the end).

True, but that's only relevant if you are really short on storage.

>> This also works with IPv6 (one should use
>> a different bit count for that, though).
> Did someone receive a spam via IPv6 not from a real MTA?

I heard of one case recently. With the rise of ipv6 we'll probably see
more, but it's not a problem right.

>> Or, don't greylist the whole world by default
> The original poster wrote "selective" in Subject.

Yes, in parenthesis. Greylisting gmail does not sound very selective to
me, but depends on one's selection criteria, of course.

>>> I attached excerpts from my config (including the whitelist) to
>>> http://wiki.exim.org/DbLessGreyListingC
>> What's the big advantage over using the builtin sqlite support for
>> greylisting?
> When I wrote that, I didn't know that sqlite is demonless. I run Exim

Too bad. One should check the available options before reinventing the
wheel :)

> Please give a link to a sqlite greylisting implementation.

http://plonk.de/sw/exim/greylist.txt has been out for quite a while.
There's also one in the wiki: http://wiki.exim.org/SimpleGreylisting



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