The term is "mainsleeze spam." Just because their customers aren't pushing v!agr4 and their lists are smaller doesn't mean their emails are any less unsolicited

The term is "mainsleeze spam." Just because their customers aren't pushing v!agr4 and their lists are smaller doesn't mean their emails are any less unsolicited. If you don't take technical measures to require your customers to affirmatively ask for permission before putting someone on their lists, you're a spammer.