My attorney says that I must have my corporate name/address and unsubscribe info on every email my site sends. Classic had a signature wordlet that was appened to all emails.
Example:
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Holodeck Corporation d/b/a BowlingFans.com
#2060, 4 Carmichael St, Suite #111, Essex, VT 05452
To stop receiving these notifications and have your account deleted please send an e-mail to example@example.com with the subject, "REMOVE"