Author: W B Hacker Date: To: exim users Subject: Re: [exim] 421 vs 451
Marten Lehmann wrote:
> Hello,
>
> I noticed that several large ISPs are denying service (closing an
> SMTP-connection at "connect") if someone is listed in a rbl with the
> code 421 (<domain> Service not available, closing transmission channel),
> while "defer" in an ACL in exim causes 451 to be send (Requested action
> aborted: local error in processing). is there a way to send 421 as 451
> implies that something locally on our side is wrong, which is not the fact?
>
> Regards
> Marten
>
This is not an answer, but I don't see an RBL hit as a '..error in processing'
at either end. Result of an error in past behaviour, maybe, but....
FWIW, we are doing that with a code 550, "Administrative prohibition"
- or less-polite words to that effect)
And for a while, after an all-nighter on MLM integration coding left an
octothorpe out of a key place in ~/configure, we were doing it to damn-near
everyone...
