Angel Marin wrote: > Hi,
>
> Marten Lehmann escribió:
>> 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?
>
> Have a look at NewStuff item 3 in exim 4.63
>
> Regards,
