>I am having a problem because of fake from addresses.  People are using
>addresses from my domain as their reply to and the from addresses.  So
>what is happening is that I have users getting 75 - 100 messages a day

that's a "problem" ??

>from other systems saying the to address they are sending to is invalid
>etc even though they never sent the message.  I do not think they are
>actually relaying through my server, but I am trying to determine a way
>to block these rejection messages without blocking all rejection
>notices.  Anyone have any ideas.

It a real tough problem, up to a DoS, when there are 1000's per hour, but 
for 75/day, go work on something else.

Len


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