On 5/17/2011 4:56 AM, Per Jessen wrote:
David F. Skoll wrote:
On Tue, 17 May 2011 09:46:09 +0200
Per Jessen<p...@computer.org> wrote:
The main/only problem I have with greylisting are otherwise legit
servers that don't do retries - usually unpatched Exchange 2003
servers.
I've never seen any Exchange server of any version fail greylisting.
(Again, I do it post-DATA which might explain it.)
(I greylist before DATA.)
I think I see a new one about perhaps once a month. The Exchange server
will build up a queue of emails and NDRs, which is only released when
the server is restarted. I'm pretty certain this is the applicable
hotfix:
http://support.microsoft.com/kb/950757/
/Per Jessen, Zürich
Unfortunately a lot of people don't have automatic updates running on
their exchange servers.
Ted
