Glossary Compliance
What is one-click unsubscribe (RFC 8058)?
Also called List-Unsubscribe header
One-click unsubscribe is an email standard (RFC 8058) in which the sender adds List-Unsubscribe and List-Unsubscribe-Post headers, so mail apps like Gmail can show an Unsubscribe button that opts the reader out in a single click.
The List-Unsubscribe header (RFC 2369) gives a link or address for opting out. RFC 8058 adds a second header that lets the mail app complete the opt-out with one request, without the reader visiting a page.
Google and Yahoo require one-click unsubscribe for bulk senders of marketing mail since 2024.
Why it matters
- A visible Unsubscribe button gives people an alternative to "Report spam".
- It is required for bulk marketing senders to Gmail and Yahoo.
- It means no unsubscribe link is needed in the body of a personal email.
How Reach Crew handles it
Every first email from Reach Crew carries the RFC 2369 List-Unsubscribe and RFC 8058 List-Unsubscribe-Post headers, so Gmail and other apps can show their own Unsubscribe button. A click stops all follow-ups to that person.
Related terms
- Unsubscribe. An unsubscribe, or opt-out, is a way for a recipient to tell a sender to stop emailing them, which the sender...
- Spam complaint. A spam complaint is recorded when a recipient clicks "Report spam" (or similar) on your email, and the spam...
- CAN-SPAM Act. The CAN-SPAM Act is the US federal law, enforced by the FTC, that sets rules for commercial email, including...