[OT] HELP!!! mail attack

[Patrick]

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.

Regards,
Patrick