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If the user has signed up explicitly for the purpose of receiving the newsletter, that's an opt-in and you're fine. if you want to use that list to send emails
by notatoad 12y ago
If the user has signed up explicitly for the purpose of receiving the newsletter, that's an opt-in and you're fine. if you want to use that list to send emails outside the scope of what the users initially signed up for, you're getting into grey area.