Author: Chris Thompson Date: To: exim-users CC: mike.meredith Subject: Re: [Exim] Rejecting bounce messages with multiple recipients
Mike Meredith <mike.meredith@???> writes:
[...] > RFC2505 2.6.1 specifically says that you MUST NOT block "<>" with
> multiple recipients because there are sometimes occasions when a bounce
> should go to multiple recipients (it mentions list aliases).
>
> As I'm pretty sure I don't have senders with multiple recipients, it's
> tempting to ignore that bit of the RFC (did I really say that?) and go
> ahead.
Tempting maybe, but dangerous. Suppose that a sender address (such as
...-request) for a list maintained outside your empire expands into
multiple recipients inside it. Or one can imagine situations where
ProfessorX@??? forwards copies of all his e-mail to both
SecretaryA@??? _and_ SecretaryB@???. In either case
error reports will arrive with multiple recipients (if the remote
MTA is up to it, anyway).
