On 2007-11-17 09:37:27 -0500, David F. Skoll wrote: > Tempfailing RCPT commands will cause interoperability problems with certain > broken SMTP implementations, specifically ones from Lotus. Here's what > happens. S is the server doing greylisting and C is the broken Lotus client: > > S: 220 foo.example.com ESMTP > C: HELO busted.lotus.box > S: 250 foo.example.com Hello busted.lotus.box > C: MAIL FROM:<[EMAIL PROTECTED]> > S: 250 Go ahead > C: RCPT TO:<[EMAIL PROTECTED]> > S: 451 Greylisting in effect, try again later > C: RCPT TO:<[EMAIL PROTECTED]> > S: 451 Greylisting in effect, try again later > C: DATA > S: 503 Need valid recipient first > C: QUIT > > at which point busted.lotus.box generates a non-delivery notification.
Just out of curiosity: Which version of Lotus was this? We've been using
Greylisting for more than 4 years now and Lotus Domino so far hasn't
made it onto my list of software which doesn't cope with greylisting
(Even though we use it ourselves). I do know behaviour such as you
describe from Novell Groupwise ...
hp
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