7 Best Fixes for Can’t Send Emails Using Mail App on Mac
Apple’s default email client app efficiently manages emails on Mac. Similar to Outlook and Gmail, you can set up an out-of-office message when offline.
This post addresses a common issue users may encounter while using Apple Mail: the inability to send emails. If you’re experiencing this problem, keep reading to discover the most effective solutions for when you’re unable to send emails using the Mail app on your Mac.
1. Check Server Connection
The Mail app lets you check your server connection status. Your email client must be connected to the server to send and receive emails. Here’s how to check:
Step 1: Press Command + Spacebar to open Spotlight Search, type Mail, and press Return.
Step 2: Click Window.
Step 3: Click Connection Doctor.
Step 4: Check if your email account is connected to the server. Click Check Again to confirm.
2. Check SMTP Server Settings
If you encounter the ‘Cannot Send Message Using the Server’ error in Apple Mail on your Mac, you should check and verify your SMTP server settings. SMTP, or Simple Mail Transfer Protocol, facilitates email exchange between computers and servers. To ensure successful email delivery, verify that you are using the correct server for your email account. Check your SMTP server configuration using the following steps:
1. Open the Mail app on your Mac.
2. Click on Mail at the top-left corner and select Settings.
3. In the Accounts tab, choose your email account from the left menu.
4. Click on Server Settings.
Step 5: Click the drop-down menu and choose Edit SMTP Server List.
Step 6: Select the SMTP server your email account uses and verify the displayed information. Remove duplicate servers by selecting them and clicking the minus icon.
Step 7: Click Advanced and ensure all fields match your email account server information.
Step 8: After confirming, click OK and try sending an email to yourself to check if the problem is solved.
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 ensure that Apple Mail hasn’t been added to the list. Although system apps like Apple Mail are allowed access through Firewall, you should still check and confirm the same if the app won’t send emails but receives them.
Step 1: Press Command + Spacebar keyboard shortcut to open Spotlight Search, type Firewall Advanced Settings, and press Return.
Step 2: Click Firewall
Step 3: Click on Options.
Step 4: If the Mail app has been added, ensure that incoming connections are allowed.
Close settings and open Apple Mail to check if the problem is solved.
4. Connect to 5GHz Wi-Fi
If your emails are stuck in Outbox, switch to a 5GHz frequency band on your Mac. This is helpful, particularly when sending large files via email. More internet bandwidth is needed in these cases. Refer to our post for instructions on choosing the best Wi-Fi channel on your Mac for optimal internet speeds.
5. Force Quit and Relaunch Mail App
To resolve the issue, force quit and relaunch the Mail app on your Mac.
1. Click the Apple logo at the top-left corner and choose Force Quit.
2. Select the Mail app and click Force Quit.
Step 3: Relaunch Apple Mail and check if the problem is solved.
6. Update Mail App
The current version of the Mail app on your Mac might have bugs. Update the app by installing a new version of macOS.
Step 1: Press Command + Spacebar to open Spotlight Search, type Check For Software Updates, and press Return.
Step 2: If available, download and install any updates.
Step 3: Next, open the Mail app and check for resolution.
7. 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. Read our post to learn how to boot your Mac in Safe Mode.
Send Emails on Mac
These solutions can help if Apple Mail isn’t sending emails on your Mac. You can also block emails in the Mail app to stop receiving spam or unwanted emails.
As Fred Humiston, the author behind Twothirds.us, I focus on providing practical and easy-to-follow guides and solutions for a variety of technical issues that people commonly face.
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I also delve into more general tech tips, like how to block numbers on landlines or use VPNs without Wi-Fi. My goal is to make technology more accessible and less intimidating for everyone, whether you’re a tech novice or a seasoned user. I strive to offer clear, concise, and helpful advice to make your digital experience smoother and more enjoyable.