- Step 1: As soon as the unable to delete error message is displayed on your device screen, refresh your system by pressing the F5 button several times.
- Step 2: After that, try to delete the unread emails in Gmail.
- Step 3: If it does not fix the issue, clear your web browsers cache and cookies and then try to delete unread emails on your Gmail account.
- Step 4: To clear cache and cookies in the Google Chrome web browser, follow the quick, simple steps given below.
- Step 5: Locate and click the More menu or Vertical three dots icon.
- Step 6: Choose More tools Clear browsing data All time.
- Step 7: Check mark the checkbox beside the Cookies and other site data & Cached images and files option and click the Clear data button.
- Step 8: Now the cache and cookies clearing process begins, wait for it to complete.
- Step 9: After that, sign in to your Gmail account and then try to delete unread emails.
- Step 10: If the unable to delete unread emails issue persists, then disable your antivirus application temporarily and check if the mass deletion is possible.
- Step 11: If not, open a private window and then try to perform the email deletion process.
- Step 12: Otherwise, log out and log in again to your Gmail account and then try to perform the mass email messages deletion process.
- Step 13: To get more technical support on how to delete all unread Emails in Gmail issue, click the Call button available on this screen. If you are an iPhone user, click here to know about how to delete all Emails on iPhone