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I've been doing some testing and reading some email marketing guidelines and they all say that you should include both URL unsubscribe (which Sendy supports) and mailto link (which Sendy doesn't support) in a list-unsubscribe header.
I'm not an expert but I guess this can affect deliverability. What do you think? Are there any plans to include this feature in next Sendy versions?
Sendy already includes the List-Unsubscribe header with the instant unsubscribe link in the header for every email campaign and autoresponders sent via Sendy.
As long as the unsubscribe link OR mailto link is in the header, that is sufficient, there is no need for both.
Ok, I see. Thanks for the answer, Ben!
All the best,