need organizational hint

[Ian G Batten]

On Thu, 10 Apr 2003, Adam Tauno Williams wrote:
> > 4.  Delivery attempts to a non-existant user must always give a
> >     550 error response.  No queueing of a any delivery failure
> >     messages whatsoever.
> 
> This is the default behaviour of MTA->Cyrus (via LMTP) delivery.

Are you sure?  Sendmail 8.12.9 with the cyrusv2 backend, Cyrus 2.1.12:

220 offsite.batten.eu.org ESMTP (No Unsolicited Commercial Email)
ehlo localhost
250-offsite.batten.eu.org Hello localhost.localdomain [127.0.0.1], pleased to meet you
250-[...]
250 HELP
mail from:<igb at batten.eu.org>
250 2.1.0 <igb at batten.eu.org>... Sender ok
rcpt to:<this.name.does.not.exist.honestly at batten.eu.org>
250 2.1.5 <this.name.does.not.exist.honestly at batten.eu.org>... Recipient ok
data
354 Enter mail, end with "." on a line by itself
From: igb
To: rubbish
Subject: hello


1234
.
250 2.0.0 h3BCR10d019664 Message accepted for delivery

I then get mailed back:

[...]
   ----- Transcript of session follows -----
... while talking to [127.0.0.1]:
>>> DATA
<<< 550-Mailbox unknown.  Either there is no mailbox associated with this
<<< 550-name or you do not have authorization to see it.
<<< 550 5.1.1 User unknown
550 5.1.1 <this.name.does.not.exist.honestly at batten.eu.org>... User unknown
<<< 503 5.5.1 No recipients

ian