[Greylist-users] Which greylist system for fastest & easiest
brunson at brunson.com
Thu Apr 21 16:48:32 PDT 2005
Graham Toal wrote:
>I had always planned to add greylisting at the source code level to
>my standalone transparent SMTP filter that I've been using for
>spam and virus filtering over the last year. Unfortunately due
>to various factors I won't go into, I don't have the luxury of
>doing an R&D project over a suitable period of time to do this
>the way I wanted - I need to get something in place relatively
>quickly, and it will probably go into a production environment
>within days of being tested :-(
>So, two questions: do any commercial spam filters offer
>greylisting as well? (eg Brightmail, that kind of appliance)
>and assuming the answer is no, what is the best way to bring up
>a reliable greylist that won't require lots of manual tweaking
>and will 'just work' reliably (and reasonably unattended)?
>I have complete control over the environment, and can bring up
>any flavor of linux that may make this easier... (although for
>testing purposes running in a UML under FC3 would sure be nice)
>I'm not trolling and I don't want to start a "my greylist is
>better than your greylist" war, but I do need a good solid
>workable suggestion quickly please. if you prefer to email me
>directly, that's fine.
>Graham <gtoal at gtoal.com>
I found sqlgrey's installation and setup with my (fairly complex)
postfix installation to be almost trivial, though I am pretty
experienced with mysql and postfix.
As for effectiveness: SpamAssassin was quarantining about 25-30 pieces
of spam for me per day (RBLs reject about 1000-3000 emails before they
hit SA) before I installed sqlgrey. After sqlgrey, SA has caught, on
average, slightly less than one spam per day and I have gotten exactly
ONE false negative in my Inbox in the past month.
As for reliability: I host mail for several hundred users in 30 domains
and I haven't had a single complaint about lost email in the 5 weeks
I've been using it.
As for ease of use: I installed it and it just runs. Other than a
slight tweak to the config to mail me if it can't contact the database,
I have not done a single thing with it except browse through the
whitelist just for curiosity's sake.
It's the only product I've used, but I think it Rocks!
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