11: How do I unsubscribe from this mailing list? If you are receiving a GNU mailing list named "XXX", you might be able to unsubscribe from it by sending a request to the address <XXX-request@prep.ai.mit.edu>. However, this will not work if you are not listed on the main mailing list, but instead receive the mail from a distribution point. In that case, you will have to track down at which distribution point you are listed. Inspecting the "Received:" headers on the mail messages may help, along with liberal use of the "EXPN" or "VRFY" sendmail commands through "telnet <site-address> smtp". Ask your postmaster for help.