FIX: Emails stuck in Outbox queued & not sending in Gmail

Matthew Adams
by Matthew Adams
Windows & Software Expert
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  • Emails can get stuck in Gmail’s Outbox when users try to send messages.
  • This troubleshooting guide includes some resolutions that can feasibly fix Gmail when its messages get stuck in its Outbox.
  • Don't hesitate to check out our detailed Gmail webpage for some extra information.
  • Our Web & Cloud hub offers you access to some more useful guides on this topic.
fix emails stuck in outbox gmail

Some users have posted on Google’s forum about Gmail emails getting stuck in the Outbox. When those users try sending emails, the messages get queued in Gmail’s Outbox. Consequently, users can’t send emails when the issue arises.

What can I do if my email’s stuck in the Gmail outbox?

1. Deselect the Enable offline mode

  1. Open the Gmail web app in a browser.
  2. Click the Settings button in Gmail.
    See all settings button emails stuck in outbox gmail
  3. Press the See all settings button.
  4. Next, click the Offline tab shown directly below.
    Enable offline mail button emails stuck in outbox gmail
  5. Deselect the Enable offline mode checkbox if it’s selected.

2. Check the file size of email attachments

If you’re sending emails with file attachments, check the total file size. If the file size of your attachment exceeds 25 MBs, then you won’t be able to send it.

To resolve this, try sending emails using a compressed archive.

To make this process as easy as possible, we recommend that you use the powerful WinZip.

Besides being able to archive any file without loss of quality, its features enable you to split a big-sized file (GBs) into as many archives as needed.

This will allow you to send files through the Gmail app without any worry about the size limitations.

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3. Clear Gmail’s cache

  1. To clear Gmail’s cache in Chrome, click the Customize Google Chrome button.
  2. Select Settings to open that tab.
  3. Click Privacy and Security on the left of the Settings tab to open the options shown directly below.
    Privacy and security tab emails stuck in outbox gmail
  4. Click Cookies and other site data to open further options.
  5. Then click See all cookies and site data to open a list of site data.
  6. Type mail.google in the search box.
    mail.google search emails stuck in outbox gmail
  7. Click the Remove button for mail.google to erase that cached data.

4. Clear the Gmail app’s data

  1. To clear the Gmail app’s data on Android mobile devices, tap Settings to open further options.
  2. Tap Apps & notifications to open a list of apps.
    Apps & notifications emails stuck in outbox gmail
  3. Next, select the Gmail app listed.
  4. Select the Force Stop option if you can.
  5. Then tap Storage to open the options shown directly below.
    Clear Cache button emails stuck in outbox gmail
  6. Select the Clear Cache option.
  7. If the issue persists after clearing the cache, select the Clear Data option.

5. Select the Allow background data usage option

  1. To allow background data usage on Android mobiles, open Settings.
  2. Tap the Apps tab.
  3. Next, select Gmail on the app list.
  4. Tap Mobile Data to open the options shown directly below.
    Allow background data usage option emails stuck in outbox gmail
  5. Toggle the Allow background data usage option on if it’s off.
  6. Also, enable the Allow app while Data saver on option.

6. Update the Gmail app

  1. Open the Google Play app on your mobile device.
  2. Then tap the button with three horizontal lines on it to open a menu.
  3. Select My Apps & Games to check for updates.
    Update all button emails stuck in outbox gmail
  4. Tap the Update button for Gmail. Alternatively, you can select the Update all button.

Those are some of the resolutions users have confirmed fix Gmail emails getting stuck in the Outbox for both the mobile and web app. So, those potential fixes are worth a shot.