Spam Resource: FAQ: List Unsubscribe on Apple Mail on iOS

Al Iverson just posted a new engaging write-up on Spam Resource:

Here’s an updated version of a guide I put together back in 2016 to help folks understand how the list-unsubscribe functionality works on Apple Mail on iOS.It was back in 2016 that we learned that Apple planned to add list-unsubscribe support to Apple’s iOS email client, and that support came with iOS 10. Many ESPs have long supported a special header, the “list unsubscribe” header. Google’s Gmail and Microsoft’s Outlook.com, along with some other email clients or platforms, look for this header, and if it is found, they’ll put some sort of prominent “unsubscribe” link or button in a special place in their user interface. At Gmail, in particular, this header tends to show only for “good” senders, so if you’re a sender and you do see this extra unsubscribe link when sending to Gmail subscribers, know that Gmail probably considers your mail stream to be a wanted and safe one.

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