On 09 Sep 11:01, Jonathan Gilpin wrote: >
> On an exim server:
>
> Sending:
>
> MAIL FROM: <>
> 250 OK
>
> Surely I need to prevent this from being allowed? How can I make Exim
> reject a message if MAIL FROM: is blank?
No, MAIL FROM being NULL is perfectly within the specification, and is
how bounces will be sent...
Rejecting them would mean that you never get any bounce messages, which
could be a bonus, but probably isn't.