- the service provider must have a written and enforcable policy
prohibiting any of its customers from sending any traffic to
recipients that have not requested the traffic -- including (but not
limited to) the sending of off-topic or unsolicited mail messages to
mailing list exploders, subsets of mailing list registrants, news
groups, and posters to news groups (termed "mail spamming"). The
requirement for a response to any such unsolicited message to prevent
future messages is unacceptable.