Re: [Exim] Re: Greylisting HOWTO for exim

* cjackson <cjackson@???> [2004-06-26 17:57]:

[greylisting]
> Nice job, Andy. But a Groupwise 5.5 sender gets bounced with this message:
>
> DATA503 valid RCPT command must precede DATA
>
> What is going on here?

Looks like this Groupwise 5.5 sender agent (is that a MUA or an
MTA?) is horribly broken.

-> MAIL FROM:<sender_address>
<- 250 Ok
-> RCPT TO:<rcpt_address>
<- 450 you are greylisted, try again later
-> DATA
<- 503 valid RCPT command must precede DATA

Which means that this Groupwise sender agent is trying to
send the message anyway even if there was no valid (=250 Ok code)
RCPT TO address before. That will cause Exim to give him a
503 permanent error for the "protocol violation".

Dominik