What is the List-Unsubscribe header? A Plain-English Guide
The List-Unsubscribe header (and RFC 8058 one-click) lets recipients unsubscribe directly from the inbox. Gmail and Yahoo now require it for bulk senders.
Why it matters for deliverability
Understanding the List-Unsubscribe header is part of a 2024 bulk-sender requirement. Get it right and more of your mail reaches the inbox; get it wrong and even legitimate mail can be filtered.
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How Rainmail helps
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