Release Notes September 09, 2026

Inbox Unsubscribe Handling

Available to all customers

Background

Mailbox providers like Gmail and Yahoo increasingly let subscribers manage email subscriptions directly from their inboxes – either directly from the individual message or from a subscription management screen.

To support these standards and give subscribers more control, marketers need a way to honor unsubscribe requests for a specific mailstream without unsubscribeing a user from all marketing communications.

 

Solution

From-address Inbox Unsubscribe Handling gives marketers a compliant way to align with how Gmail and other mailbox providers now process one-click unsubscribes. Instead of opting subscribers out of all marketing emails, one-click unsubscribes can now apply only to the specific From address the subscriber chose to leave—helping preserve engagement while maintaining compliance with evolving mailbox-provider standards.

 

What’s New

Account admins can now enable Inbox Unsubscribe Handling for each email address on the Verified Emails page.

This update includes:

• A new Inbox Unsubscribe Handling toggle for each verified email address, so you can adopt at your own pace
• A system-managed suppression list associated with each enabled From address that Sailthru automatically excludes when sending from that address
• New reporting in Email Summary, including the From address and From address unsubscribes count and rate

 

Before enabling the feature on your verified email addresses, review your mailstreams and make sure each From address represents a clear, distinct type of marketing message that subscribers expect.

Learn more about Inbox Unsubscribe Handling