Professional email not working in Gmail may arise due to various reasons such as difficulty in accessing the account, incorrect login details, server settings issues, or email client-related problems. To fix such issues, users can try resetting their password, enabling IMAP/POP settings, clearing cache and cookies, and using a different email client or app. In case of persisting issues, contacting Gmail support for further assistance is recommended.

Causes

• Incorrect email server settings
• Invalid or expired SSL certificates
• Full inbox or outbox
• Email forwarding or filtering rules
• Sending or receiving limits reached
• Email client compatibility issues
• Internet connectivity problems
• Account suspension or restrictions
• Hacked or compromised account
• Third-party app access limits.

Solution 1: Check domain configuration with your Gmail account

1. Firstly, log in to your domain hosting account.
2. Then, navigate to the DNS settings of your domain.
3. Now, confirm that the MX records are correctly pointing to Google's mail servers.
4. Verify that the SPF record is set up correctly to authorize Google's mail servers to send emails on your behalf.
5. Next, ensure that the DKIM record is correctly set up for your domain.
6. Wait for DNS propagation to occur and the changes to take effect.
7. Try sending a test email to verify that the issue has been solved.

Solution 2: Check your billing status and ensure that your payment is up-to-date

1. First, sign in to your Google Workspace Admin Console with your administrator account.
2. After that, you have to go to the Billing section.
3. Check your billing account status and ensure that your payment details are correct and up-to-date.
4. Now, verify that your payment method is not expired or declined.
5. If your payment is overdue, make a payment to restore your service.
6. Contact Google Workspace support if you have any billing-related queries or issues.

Solution 3: Ensure that your Gmail account has been properly set up with your domain

1. First, log in to your Gmail account associated with your domain.
2. Next, click on the gear icon in the top right corner and open the Settings tab.
3. Then, go to the Accounts and Import tab and tap on Add another email address.
4. Enter the email address associated with your domain and hit the Next button.
5. Choose Import emails from my other account (POP3) or Link accounts with Gmail option based on your preference and follow the steps on the screen to finish the setup.
6. Verify the email address by tapping the verification link in the confirmation email sent to the address.
7. After that, go to Settings again and open the Accounts and Import tab.
8. Now, set your domain email as the default "Send mail as" option and save the changes.
9. You have now properly set up your Gmail account with your domain.

Solution 4: Verify that your DNS settings are configured correctly for your domain

1. Log in to your domain registrar account and find the DNS settings for your domain.
2. Then, check that the MX record is pointing to the correct server address for your Gmail account.
3. After that, verify that the SPF and DKIM records are set up correctly.
4. Now, check that any CNAME or A records required by your email provider are set up correctly.
5. In the end, save any changes made and wait for the DNS to propagate.