On Tue June 28 2005 01:42, Robert A. Rosenberg wrote:
At 16:34 -0400 on 06/27/2005, Keith Moore wrote about Re:
Bounce/System Notification Address Verification:
Wrong. There is no prohibition that I'm aware of against using <> for
other purposes, and there are some standards that specifically require
using <> - e.g. MDNs and responses from mail robots, neither of
which are constrained to exactly one recipient.
OTOH: There is no requirement that the generator of these responses
(when presented with a request/need to sent such a message to more
than one recipient) create a single copy of the message as opposed to
one personally addressed copy per recipient.
You are correct that there is no *requirement*, but sending an MDN to
multiple recipients is explicitly permitted and in fact may be specified
by the sender; RFC 3798:
mdn-request-header = "Disposition-Notification-To" ":"
mailbox *("," mailbox)
N.B. multiple MDN recipients may be specified.
Rejecting what is explicitly permitted is probably not a good idea unless
there is some ancillary information or some overriding consideration.
Administratively rejecting specific permitted, useful, non-harmful
information that users have explicitly requested is probably not sound
policy.
Creating multiple copies
preserves the "Only One Recipient for a 'Mail From <>' message" rule.
Where exactly is that "rule" specified?