[courier-users] Re: MAXRCPT per domain

Rodrigo Severo <rodrigo.lists@fabricadeideias.com> wrote:

> I am not sure Courier is getting the 552 error *imeadiatly after* RCPT
> TO. I can't be sure from the mail delivery status message I'm getting.

You can tell by counting the bounces. If all N recipients bounce,
the 552 was presumably a response to the DATA command or the data.
If only N-20 recipients bounce, you can be sure the 552 was a response
to RCPT TO, because there is no other time when a response can affect
only a subset of the recipients.

> But I bet it is as I get one different UNDELIVERABLE MAIL message per
> recipient after the 20th.

Yes, you win your bet.

> A client (Courier in this case) SHOULD treat a 552 error after a RCPT TO
> command as 452. But the text says SHOULD and not MUST.

I think it would be desirable for Courier to implement the RFC's
suggestion, and treat a RCPT TO response of 552 as a synonym for 452.
It would be very helpful in some situations (such as the one you are
experiencing now) and I don't think it would ever be harmful.

Possibly you could patch it yourself? I haven't looked at the code to
know whether this would be easy.


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