Ungrouping email in gmail
When people reply to an email, Gmail groups responses together in a single conversation with the newest message on top.
A conversation breaks off into a new thread if the subject line changes or the conversation reaches more than 100 messages.
In some cases, you can change this default view.
Turn Conversation View on or off
On Computer:
If you want replies to show as individual messages in your inbox, follow these steps:
- Open Gmail.
- In the top right, click the gear icon Settings.
- Click Settings.
- Staying in the "General" tab, scroll down to "Conversation View." Choose "Conversation view on" or "Conversation view off."
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At the bottom of the page, click Save Changes.
To see all the messages in a conversation, click the "Expand all" button 
.
On Mobile App:
- Open the Gmail app.
- Touch Menu.
- Touch Settings.
- Touch General settings.
- Check or uncheck the box under "Conversation view."
Email responses will now show up individually in your inbox and won’t be grouped together.