Bounce messages - a warning

[Ron Campbell]

We had an unpleasant experience this week when one of our mail relays
got into SPAMCOP. It turned out this was due to "bounce messages"
(non-existent users etc) hitting their spam-traps (whatever they are ?)

It emerged that their system ignores delivery failure notices if they
have the following line in their headers -

Content-type: multipart/report; report-type=delivery-status;


This may be common knowledge to some people, but it was a new one
on me !!


                    Cheers ...  Ron