[Gllug] OSS Spam filtering, virus scanning email solutions

[Matthew Thompson]

Hi,

Got a bit of a puzzle - we already have plenty of anti virus and anti 
spam in place on our company's email system but it seems that our use of 
the Spamhaus SBL+XBL feed is annoying some journalists who insist on 
using dodgy russian ISPs.

I've been asked to provide a method that we can use to provide thises 
punters with the ability to email us unhindered and I think that a 
standalone OSS solution is likely to be what I need.

But I can't find any applications that will reject emails until the user 
confirms their identity. Anyone got any pointers - or better still 
examples of other ways I can acheive this?

M at t :o)
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