- Step 1: On your Mac, verify whether you have a standard Internet connection.
- Step 2: Click the Apple menu available at the top-left corner of the screen and select System Preferences.
- Step 3: In the System Preferences window, give a double-click on the Network icon.
- Step 4: Navigate to the left-side panel and select your network.
- Step 5: Ensure that the green light is indicated under the communication medium.
- Step 6: In the Mail app, make sure that you have entered the valid email address (recipient’s Gmail address).
- Step 7: Check the Outbox settings by clicking the Mail menu and selecting Preferences from the drop-down list.
- Step 8: In the Internet Accounts window, verify the mail settings and check if you have entered the correct Gmail server settings.
- Step 9: To do so, select your Gmail account from the left-side panel first.
- Step 10: Click on Account Information and Server Settings.
- Step 11: Go to the Outgoing Mail Server section and select the Edit SMTP Server List option from the drop-down menu.
- Step 12: Next, select Gmail from the list of SMTP servers.
- Step 13: Click the Server Settings button and check whether you have configured the correct hostname.
- Step 14: If the problem remains unsolved, the Mail preference file might be corrupted.
- Step 15: This could prevent the Mail app from sending emails.
- Step 16: To fix this issue, create a backup of your Mac using the Time Machine Backup.
- Step 17: Next, repair the Mac Mail using the built-in recovery tools (Disk Utility).
- Step 18: You can also repair the corrupted Mail preference files using a trusted third-party tool.
- Step 19: If you need a remote assistance to fix Mac mail Outbox not sending Gmail, click the Call button available on this screen to contact our technical support team for remote assistance.
