Fix: Windows 10 Mail Not Sending

Is your Windows 10 Mail app not sending emails? Then there might be an SMTP server error or some synchronization issues. This issue can be fixed with the below-mentioned steps.

Solution 1: Remove and re-add the email account in the Mail app

  • Step 1: On your Windows computer, launch the Mail app and click the Settings icon at the bottom-left corner of the screen.
  • Step 2: On the right-side pane, click on Manage Accounts.
  • Step 3: Choose the email account that is failing to send emails and click the Delete account from this device button.
  • Step 4: After removing your email account from the Mail app, restart your computer and relaunch the Mail app.
  • Step 5: Click the Settings icon again and select the Manage accounts option at the right-side panel.
  • Step 6: Next, click the Add account button and re-add your email account.
  • Step 7: After configuring your email account in the Mail app, check if you can send emails.
  • Step 8: If the problem persists, move on to the next solution.

Solution 2: Reset the Mail app settings

  • Step 1: On your Windows computer, open Settings by pressing the Windows + I shortcut keys.
  • Step 2: Click on Apps and select the Mail and Calendar app in the Apps & Features section.
  • Step 3: Expand the Mail and Calendar app and click the Advanced options link.
  • Step 4: Under Reset, click the Reset button.
  • Step 5: Now, open the Mail app again and sign in to your email account.

Solution 3: Allow access to the Mail and Calendar app in Windows Firewall

  • Step 1: On your Windows computer, click the Start menu and type 'allow' in the search panel.
  • Step 2: From the search result, click the Allow an app through Windows Firewall tab.
  • Step 3: Click the Change settings button available at the top-right corner of the screen.
  • Step 4: Make sure that you have logged in with administrator rights.
  • Step 5: Scroll down the page and select the 'Mail and Calendar' checkbox.
  • Step 6: Enable both the Public and Private checkboxes and click the OK button.
  • Step 7: Now, open the Mail app and check if the problem has been resolved.

Solution 4: Run the Windows troubleshooter

  • Step 1: Open the Windows Settings window by pressing the Windows + I shortcut keys.
  • Step 2: Click on Update & Security and navigate to the left-side panel.
  • Step 3: Click the Troubleshoot tab and move on to the right side of the window.
  • Step 4: Select Windows Store Apps and click the Run the troubleshoot button.
  • Step 5: Close the Settings window and relaunch the Mail app.
  • Step 6: Try sending a test mail from your email account and check if the Windows 10 Mail Not Sending problem has been resolved.