message-bogus-addresses

message-bogus-addresses is a variable defined in `message.el'.
Its value is

("noreply" "nospam" "invalid" "@@" "[^[:ascii:]].*@" "[ 	]")

Documentation:
List of regexps of potentially bogus mail addresses.
See `message-check-recipients' how to setup checking.

This list should make it possible to catch typos or warn about
spam-trap addresses. It doesn't aim to verify strict RFC
conformance.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 23.1 of Emacs.