On Fri, 2005-03-04 at 10:10 +0000, Ron McKeating wrote:
> When an MTA tries to deliver an email, the sender (they were not sure if
> it was the actual sender email address or the sending server helo) is
> looked up in a database, if they are valid senders then the email is
> accepted. If they are not in the database, then the message is given a
> defer, the sender is then written into the database. The idea is when
> they retry they will be in the database as so they accept the email. The
> whole point being that genuine email will retry, spammers do not retry.
> Now we could implement this with exim, perl and mysql fairly easly. But
> wondered what people thought of it as a policy.
Thats greylisting. You will find plenty of opinion on it.
[Presumably Mirapoint whitelist the broken places that don't handle
defers - I believe hotmail is among them - although there are bound to
be some smaller ones]
Nigel.
--
[ Nigel Metheringham Nigel.Metheringham@??? ]
[ - Comments in this message are my own and not ITO opinion/policy - ]
