Re:Man donated blood every week for 60 years and helped save...
by zokier on Saturday May 12, 2018 @12:48PM
(#17054850)
Notably CAN-SPAM act requires spam to have effective and visible unsubscribe links. While this doesn't impact off-brand Viagra and Nigerian prince spammers, most legitimate US businesses (such as American Red Cross) should be compliant.
https://en.wikipedia.org/wiki/CAN-SPAM_Act_of_2003