Take a look at the Email Verify module.

Nancy

Injustice anywhere is a threat to justice everywhere. -- Dr. Martin L. King, Jr.

From: Roger

I now have it turned off and the system does as intended, however it is
open to the abuses of before where I was receiving a number of suspect
and fictitious requests from web nasties, obviously redirected or just
plain phony email addresses.
Unfortunately there seems no way to filter for those.