Group emails into conversations
Choose your conversation settings
When people reply to an email, Gmail groups responses together in conversations with the newest email on the bottom.
A conversation breaks off into a new conversation if the subject line changes or the conversation gets to more than 100 emails.
Important: Turn off Conversation view to hide Nudges. To continue to use Nudges, keep Conversation view turned on. Learn more about Nudges.
Open Gmail.
At the top right, click Settings > See all settings.
Scroll to Conversation view.
Select Conversation view on or Conversation view off.
How Gmail groups automated emails?
Important: Emails are grouped when your conversation view setting is turned on.
If you manage a system that sends automated email notifications to a group of people, Gmail might automatically group them into the same conversation.
Emails are grouped if each message meets the following:
The same recipients, senders, or subject as a previous message
A reference header with the same IDs as a previous message
Sent within one week of a previous message
To prevent grouped emails:
Create a new subject for each message that you don’t want to group.
Send each message with a unique reference header value that doesn’t match a previous message.