I am sending via Amazon SES API. I just sent a test message to myself before sending to my list, and noticed that the header unsubscribe is missing (see attached). Is there a setting I need to toggle to turn it on?
That header is shown by GMAil based on the sender reputation. If you look in the email source, you should see the List-Unsubscribe header as part of the email, at least, mailwizz is setting that for sure.
@twisted1919 thank you, the preheader is in the source code (didn't think to look, sorry). Didn't realize gmail did such weird stuff to our messages (not showing preheader unsubscribe, causing false open triggers, etc).