Only use email lists for those who have said they want to receive email from you. Opt-in is the only way to go. You need verifiable assurance that the e-mail addresses on any list you rent or buy belong to people who have raised their hands and said, 'Send us e-mail.'" The fact is, even people who sign up to receive commercial
e-mail often forget that they've done it, and complain about junk e-mail.