On Sun, 11 Aug 2013, Amir 'CG' Caspi wrote:
At 9:31 PM -0400 08/11/2013, Alex wrote:
Are you using sqlgrey? If not, it's incredible and you should try it.
I have not implemented any sort of greylisting yet. I can't use sqlgrey
because I don't use postfix... my server runs sendmail. I'm sure there are
some good sendmail-compatible greylisters but I haven't tried them yet...
milter-greylist is what I use, it seems to do the job, and it does reduce
the spam volume.
I'm a bit worried about legitimate email getting bounced.
The only problem would be with a sending MTA that either is badly
misconfigured or cannot properly deal with a tempfail result and either
bounces the message as undeliverable or (worse) quietly drops it.
Sadly there are some major players with this problem who are apparently
uninterested in fixing their systems. I suggest you do a bit of research
on whitelists for greylisting before implementation. You would also
probably want to whitelist known regular correspondents.
There's also the need to set your users' expectations. They should be
trained that email is *not*, and is not intended to be, instantaneous.
--
John Hardin KA7OHZ http://www.impsec.org/~jhardin/
jhar...@impsec.org FALaholic #11174 pgpk -a jhar...@impsec.org
key: 0xB8732E79 -- 2D8C 34F4 6411 F507 136C AF76 D822 E6E6 B873 2E79
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