RE: [Exim] Mail from:<>

On Thu, 2004-08-05 at 04:02, Tony Finch wrote:
> On Thu, 5 Aug 2004, Dickenson, Steven wrote:
> >
> > We only allow it for messages with a single recipient.
>
> A bounce can legitimately have more than one recipient if the original
> message was sent with an alias in the return path that expands to more
> than one recipient (an admittedly rare case).

Or if the original message contains an "Errors-To:" header:
Errors-To: admin1@???, sender@???

You don't want to reject bounces with more than one recipient if you use
such headers in outgoing mail.

-tor