[Mimedefang] Re: Justifying greylisting to management

Tomasz Ostrowski tometzky at batory.org.pl
Wed Mar 1 05:13:20 EST 2006

On Sun, 26 Feb 2006, David F. Skoll wrote:

> Now, there *are* some marginal SMTP servers that fail in the
> following scenario:
> C: HELO myname.domain.com
> S: 250 whatever
> C: MAIL FROM:<foo at domain.com>
> S: 250 2.1.0 go ahead
> C: RCPT TO:<recipient at domain.com>
> S: 451 4.7.1 greylisting; try in 2 minutes
> S: 503 5.0.0 need RCPT!
> (and client bounces message)

This could be avoided if sendmail would tempfail "data" requests if
any "rcpt to" request tempfailed and every "rcpt to" request tempfailed
or permfailed.

Maybe a small patch for sendmail would do it.

...although Eating Honey was a very good thing to do, there was a
moment just before you began to eat it which was better than when you
                                                      Winnie the Pooh

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