On Wed, 29 Aug 2007 09:54:25 EDT, Mike said:
> As I said the owner receives 3-4 per day. Is this a spammer who is
> trying to send sign-off requests for random email addresses?

I often easily see 3-4 a day of the following:

1) User subscribes as [log in to unmask]
2) User gets new account [log in to unmask], forwards cheapmail.com mail there.
3) user gets [log in to unmask], resets his forwarding on cheapmail,
and closes down newmail.com

4) User goes to unsub, remembers they subbed under an old address, and sends
the now-dead newmail.com address rather than the even older but still working
cheapmail.com address.

*usually*, looking at the From: for the unsub and likely near-matches on the
list will show what's going on.  If that doesn't flush it out, the list owner
can always post a monthly reminder "Unsub from the address that was actually
subscribed" and see if that helps...

Or are the From: addresses totally and obviously bogus or otherwise not
possibly just user errors?