4 Fixes for Can’t Send Emails Using Mail App on Mac

Paurush dabbles around iOS and Mac while his close encounters are with Android and Windows. Before becoming a writer, he produced videos for brands like Mr. Phone and Digit. On weekends, he is a full-time cinephile trying to reduce his never-ending watchlist, often making it longer.

Basic Fixes

Fix 1: Check Server Connection

The Mail app allows you to check your server connection status. Your email client should be connected to the email server.

Step 1:Open theMail app > Window > Connection Doctor.

Step 2:Check whether your email account is connected to the server. You can click onCheck Againto confirm the same.

Fix 2: Check SMTP Server Settings

If you see the Cannot Send Message Using the Server error in Apple Mail on your Mac, you need to check and then verify your SMTP server settings. SMTP or Simple Mail Transfer Protocol helps computers and servers to exchange emails. You should verify the required server for your email account. You need to check the configuration settings of your SMTP server.

Step 1:Open theMail app > Settings > Accounts > Select your email account.

Step 2:Click onServer Settings.

Step 3:Click the drop-down menu and then selectEdit SMTP Server List.

Step 4:Select theSMTP serverthat your email account uses and thenverify the information displayed.

You can remove duplicate servers by selecting them and thenclicking the Minus icon.

Step 5:Click onAdvancedand then ensure that all the fields match the information provided by your email account server.

Step 6:After confirmed, click onOkand then trysending an email to yourself.

Fix 3: Disable Firewall

A firewall on your Mac prevents unwanted contact from other computers while you are connected to the internet. Your Mac allows you to restrict certain apps using Firewall and then ensure that Apple Mail hasn’t been added to the list.

Step 1:PressCommand + Spacebarkeyboard shortcut to openSpotlight Search, typeFirewall Advanced Settings,and then pressReturn.

Step 2:Click onFirewall > Options >If the Mail app has been added,ensure that incoming connections are allowed.

Fix 4: Use Safe Mode

If none of the solutions have worked, we suggest booting your Mac in Safe Mode to troubleshoot the issue with the Mail app. This will prevent third-party app interference and check if system apps like Apple Mail function properly.

For Macs With M-Series Chip

Step 1:Shut down your Mac.

Step 2:After your Mac shuts down,press and hold the Power Buttontill you see the two startup options –Macintosh HD and Options.

Step 3:SelectMacintosh HDwhile holding the Shift key and then selectContinue in Safe Mode.

For Macs With Intel Chip

Step 1:Restart your Mac.

Step 2:Press and hold the Shift keywhen your Mac restarts.Release the Shift keywhen you see the login window.

Tip:Refer to our post to learn how toset Out of Office message on Mac mail.

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Last updated on 26 August, 2024

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