- Step 1: You cannot send emails if SMTP is offline.
- Step 2: Go to the Apple menu and select the Force Quit option.
- Step 3: Choose Mail > Force Quit -> Force Quit.
- Step 4: After you restart your Mac computer, launch the main interface of the Mail application and check if the SMTP server offline problem has been resolved.
- Step 5: Check if the port number for the outgoing mail (SMTP) server you have entered is correct.
- Step 6: Now, open a new email by clicking the Compose New Message option.
- Step 7: While filling the From field, the os x mail smtp server offline message will appear on the screen.
- Step 8: Make sure to choose the ‘Use only this server’ option.
- Step 9: You can send emails from your email account.
- Step 10: As soon as you click the Send button, you have to type the email account password correctly when prompted.
- Step 11: If the SMTP server offline issue does not resolve, follow the procedure given here to resolve it.
- Step 12: If you have opened the Apple Mail application, close it.
- Step 13: Remove your email account from Apple Mail and re-add it.
- Step 14: Go to the desktop of the Mac computer, click the Apple log at the top-left corner of the screen, and choose the System Preferences option.
- Step 15: After clicking the Internet Accounts option, choose the email address with the the SMTP server offline issue.
- Step 16: Once you click the minus icon at the bottom, the selected email address will be removed from Apple Mail to solve os x mail smtp server offline.
- Step 17: Make sure to reboot the Mac computer.
- Step 18: After you select the System Preferences option from the Apple menu, click the Internet Accounts option.
- Step 19: Choose the account type and add your email account to Apple Mail again by following the on-screen instructions.
- Step 20: If the problem persists, choose the Preferences option from the Mail menu.
- Step 21: Click the Accounts option, choose your email address, and select the checkbox next to the Enable this account option.
- Step 22: You can also contact our technical experts for resolving the OS X mail SMTP server offline problem.