[PLUG] Mailling bounces messages from non-existant addresses

[Randy Bush]

> I have a script that uses mail to send messages to my notification list
> addresses.
> 
> Some addresses are folks who've change employers or retired and I removed
> their addresses from the list. Yet, three of those no longer on the address
> list produce bounces from the recipient's mail server because they're no
> longer there.
> 
> I grep'd all files in the parent directory and cannot find those addresses
> anywhere on my system.
> 
> What might cause messages to go to those missing addresses? Does 'mail' have
> a cache that might include them?

a forward to a bad address from what looks to be a good address

e.g.

you send to foo at bar.  over in bar land, foo.bar forwards to foo.bad.
oops!

take a look at the Received: lines in the header of a message that was
bounced

randy