CASL and cold messages. Opt-in is not that necessary.

Quoted on this wiki

Every place a page here uses this source, in the order the words come in it.

1. One big “no-no” “Under no circumstances, never-ever, message somebody who specifically told you not to.” This includes, but is not limited to: - unsubscribing, - “No unsolicited email” line on their website, and - “Go f..k yourself, damn spammer” written, said, whispered or broadcasted to you.

   In CASL consent requirements

2. Because good luck proving you had their implied consent “4. Ignoring when they unsubscribe” Well, we talked about it already

   In Opt-out handling

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