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Email delivery is stupid. I’m not kidding. It’s been around for over 20 years but we still have 50+ email clients that all display the same code differently. And we tens of thousands of Internet Service Providers (ISPs) who all basically have their own rules around managing SPAM. We have ESPs that have stringent rules that businesses have to conform to when adding a single sub ...
… spam filter doesn’t block these opt-out requests. Honor opt-out requests promptly. Any opt-out mechanism you offer must be able to process opt-out requests for at least 30 days after you send your message. You must honor a recipient’s opt-out request within 10 business days. You can’t charge a fee, require the recipient to give you any personally…