Stan Hoeppner:
> Wietse Venema put forth on 1/1/2011 9:50 AM:
> > Stan Hoeppner:
> >> jason hirsh put forth on 12/31/2010 3:38 PM:
> >>
> >>> Dec 31 15:24:21 tuna postfix/smtpd[2514]: >
> >>> asmtpout029.mac.com[17.148.16.104]: 554 5.5.1 Error: no valid recipients
> >>
> >> Am I the only one that noticed this^? Or, am I the only one that
> >> (mistakenly?) thinks it may be relevant?
> >
> > See RFC 2920 (perhaps after refreshing up on RFC 2821).
> >
> > Wietse
>
> What exactly am I supposed to be looking for Wietse? What I was
> pointing out is that it appears he returned both 450 and 554 responses
> during the same smtp transaction with 17.148.16.104. I was of the
> understanding that you return one or the other, not both. Is that what
> I'm supposed to be reading about?
If you have a question about this sequence:
C: MAIL FROM:<sender>
S: 250 sender accepted
C: RCPT TO:<recipient>
S: 4XX recipient greylisted
C: DATA
S: 5XX no valid recipients
Then it is perhaps illustrative to look at this from the sender's
perspective:
C: MAIL FROM:<sender>
RCPT TO:<recipient>
DATA
S: 250 sender accepted
4XX recipient greylisted
5XX no valid recipients
Now, please refresh up on RFC 2821 and then study RFC 2920.
Wietse
