I want to suppress email headers List-Unsubscribe-Post and List-Unsubscribe for transactional emails with Mailjet. I'm using API 3.1 and Python. See https://dev.mailjet.com/email/guides/send-api-v31/
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Response from the vendor Mailjet on 9/7/22 via a Support Ticket that I submitted:
"While the unsubscribe link itself isn't shown in the body of the email for transactional-based sends we, and some other email service providers, are obligated to include it within the headers of all emails sent from Mailjet. Having this header is a requirement for being part of the Certified Senders Alliance (CSA) so it is unable to be removed.
If the inbox does show an unsubscribe link for a transactional-based send, this will not unsubscribe the recipient from any particular list."

Warren Van Wyck
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