Threading changes in Gmail conversation view
Friday, March 29, 2019
- A message is sent in reply to another
- A message has:
- The same sender or recipients,
- The same subject,
- And is sent within one week of an earlier message in the thread.
With this change, we’re adding the requirement that an incoming message’s Reference header, if present, must reference IDs of previous messages in order to thread (see image below for example). This means that if you receive two emails with the same subject from the same sender, these emails will not be threaded together unless one explicitly references the other.
- Admins: No action required.
- End users: No action required. You’ll see these changes roll out on Gmail on the web and on mobile apps.
- Have the same subject
- Have reference headers that reference IDs seen earlier in the thread, or have references headers that consistently refer to the same message ID
Additionally, if you don’t want your messages to be threaded in Gmail, you can either have different subjects or send each message with a unique References header value that will never match another message.
- Rapid Release domains: Gradual rollout (up to 15 days for feature visibility) starting on March 29, 2019
- Scheduled Release domains: Gradual rollout (up to 15 days for feature visibility) starting on April 12, 2019
G Suite editions
Available to all G Suite editions
On/off by default?
This feature will be ON by default.
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