Johan Andersson wrote:
Hi,

We are thinking to implement some form of greylisting at one of our sites and wonder which one of the many flavors out there
that this group have found reliable?

I know postfix has its builting one from a while back, but feel unsure if it viable for our site... postgrey and gps seems they added some features that mighe be usable for us... like automatic trunking of the list

I just starting to read up on it so I feel very noobish at the moment :)

We have six MTA's that receive approx 1million emails a day (total) on roundrobined addresses.

Anyone else out there with some experience on the different greylisting models?

We use sqlgrey. One backend machine running MySQL providing greylisting for nine inbound MX servers running Postfix. It works very well, apart from a fairly trivial problem caused by a race condition in the sqlgrey code when used with multiple mail servers. I say trivial, because it doesn't affect the functionality at all, but it does generate a fair number of spurious warning messages in the default configuration. There are patches to fix it, if you can be bothered, but it's easier to just switch off the warnings!

Mark
--
http://mark.goodge.co.uk - my pointless blog
http://www.good-stuff.co.uk - my less pointless stuff

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