[OT] HELP!!! mail attack

[Patrick O'Callaghan]

On Wed, 2008-03-26 at 17:49 +0100, Patrick wrote:
> On Thu, 2008-03-27 at 00:58 +1030, Tim wrote:
> [snip]
> > > There's actually a way around it in a crunch...I've put a 5 minute
> > > window.
> > 
> > That's really not a solution.  While your server may say, come back in
> > 5, you don't have any control over how, when, or if, the sender will
> > actually retry.
> 
> Afaik greylisting uses an RFC compliant method. So if the sending
> mailserver does not resend after a while then it is broken and should be
> fixed. FWIW I have used greylisting for more than a year now and in all
> that time I have only once seen a mailserver not resend.

We regularly see Yahoo not resend for members of Yahoo Groups. My view
is that I don't care, but of course you can always whitelist it.

poc