[Mimedefang] Greylisting and Primus
David F. Skoll
dfs at roaringpenguin.com
Thu Sep 29 21:07:52 EDT 2005
Matthew.van.Eerde at hbinc.com wrote:
> David F. Skoll wrote:
>>No, but we greylist after the DATA phase.
[Amusing dialogue snipped]
The problem with greylisting at RCPT time is that
the conversation goes like this:
Man: Will you marry me?
Woman: Ask again later.
Man: Will you marry me?
Woman: Ask again later.
Man: I'm not waiting, let's consummate!
Woman: *Shoots man*
Or, in actual SMTP terms:
C: RCPT TO:<x>
S: 451 Try again later
C: RCPT TO:<y>
S: 451 Try again later
C: DATA # What the heck, let's try DATA even though all RCPTS failed
S: 500 Silly client... Can't use DATA unless at least one RCPT succeeded.
C: Waah!!! *Generates bounce message*
--
David.
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