Greylisting (WAS: gif attachments)

[Michele Neylon:: Blacknight.ie]

Daniel Maher wrote:
> 
> My big fear w/ Greylisting is that a (legitmate) SMTP server somewhere won't respect the "try again later" code, and instead just fail to deliver the mail.  I've heard rumours that some of the larger webmail providers exhibit this behaviour.
> 
> Comments?
> 

Make sure you have a sane whitelist....

Gmail, for example, seems to proxy their outbound mail, so you won't see
the same sending IP.

Solution - whitelist their netblocks






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Mr Michele Neylon
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