Gmail does something like that if emails include a List-Unsubscribe header: http://mail.google.com/support/bin/answer.py?answer=81126#unsub http://mail.google.c

Gmail does something like that if emails include a List-Unsubscribe header: http://mail.google.com/support/bin/answer.py?answer=81126#unsub http://mail.google.com/support/bin/answer.py?answer=81126#un...