Re: Yahoo

[blaise @ scadian . net]

On Mon, Oct 22, 2001 at 02:43:58PM -0700, Ronald F. Guilmette wrote:
> 
> In message <Pine.LNX.4.10.10110221604380.2030-100000@ruby.ccmr.cornell.edu>,
>  Mitch Collinsworth <mitch@ccmr.cornell.edu> wrote:
> 
> >> (reason: 552 exceeded rcpt to max limit)
> >>      (expanded from: :include:/usr/local/majordomo/Lists/wbmutbb-digest)
> >> 
> >> I've tried making the Digest versions smaller in size but that doesn't seem 
> >to have corrected the problem. Anybody have any ideas?
> >
> >A "rcpt to max limit" would be the number of recipients you're
> >sending to at that site.  Sendmail sends one copy of the message to
> >each destination MTA with all recipients listed in the envelope
> >headers (rcpt to:).  The receiving sendmail will then deliver a
> >separate copy to each recipient.  Sounds like yahoo don't understand
> >the difference between mail lists and spammers.
> 
> More to the point, it is not entirely clear that the folks at Yahoo
> have either read or fully understood the following passage from RFC 2821:
> 
>    If an SMTP server has an implementation limit on the number of RCPT
>    commands and this limit is exhausted, it MUST use a response code of
>    452 (but the client SHOULD also be prepared for a 552, as noted
>    above).  If the server has a configured site-policy limitation on the
>    number of RCPT commands, it MAY instead use a 5XX response code.
>    This would be most appropriate if the policy limitation was intended
>    to apply if the total recipient count for a particular message body
>    were enforced even if that message body was sent in multiple mail
>    transactions.
> 
> (My own opinion is that most probably, they simply screwed up, and they
> ought to be issuing 452 codes for excess RCPT TOs in a given transaction.)

My opinion is that they read the RFC precisely and you missed a spot. 
This does not seem to be an implementation limit but a configured site-
policy limitation (as far as we can tell).

Jim
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