Likely fix
Fix: Gmail app not sending
The Gmail app may not send because of a bad connection, sync problem, stuck outbox, large attachment, account sign-in issue, or app cache problem.
Quick answer
Check internet, open the outbox, remove large attachments, restart the Gmail app, and make sure the account is syncing.
Important warning
If you are on a workplace or school account, admin policies may block some sending or attachment behavior.
Try this
- 1 Switch between WiFi and mobile data to test the connection.
- 2 Open Gmail and check the Outbox.
- 3 Remove large attachments from stuck emails.
- 4 Restart the Gmail app.
- 5 Restart the phone.
- 6 Make sure Gmail sync is enabled for the account.
- 7 Update the Gmail app.
- 8 Remove and re-add the account if Gmail keeps failing.
Common causes
Bad WiFi or mobile data connection.
Gmail sync is paused or disabled.
Large attachment.
Account needs sign-in again.
Gmail app cache or update problem.
Work or school policy restriction.
What to check next
- Check whether Gmail sends on mobile data.
- Check whether the email is in Outbox.
- Check Gmail sync settings.
- Check whether the account needs sign-in.
- Check whether a simple no-attachment email sends.