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Email delivery depends on the accuracy and availability of recipient addresses. When an address no longer exists or has moved, the server will return a permanent failure.
The SMTP Error 551 – Invalid or Relocated Recipient indicates that the destination email address is no longer valid or has been relocated without forwarding in place. The server cannot deliver messages to this address. Further delivery attempts to the same address will continue to fail.
TABLE OF CONTENTS
How to Resolve SMTP Error
1. Verify that the recipient’s email address is spelled correctly.
2. Contact the recipient to confirm whether their email address has changed.
3. Check whether the address is an alias that may have been removed or disabled.
4. Update the recipient address in your address book, CRM, or mailing list.
5. If you manage the recipient domain, login to cPanel and confirm that the mailbox exists.
6. Resend the email only after confirming the correct destination address.
Additional Information
- This error confirms that the recipient address is no longer valid or has been moved without forwarding.
- Some servers use this response when forwarding is no longer supported.
- Mail servers return the SMTP Error 551 to prevent repeated delivery attempts to unreachable addresses.
- Sending messages to invalid recipients increases bounce rates and impacts sender reputation.
- Regular list maintenance helps reduce errors related to outdated or incorrect addresses.
- Automated systems should be configured to suppress repeated sends to invalid recipients.
- Maintaining accurate recipient data improves overall email performance.
Login to Hosted.com® Account
1. Go to the Hosted.com® website Account Login page.
2. Enter your Email and Password and click the Sign In button.
3. You will see the Hosted.com® Dashboard, displaying the Manage Account menu on the left and your Account Information, Account Overview and Open Support Tickets on the right.
Login to cPanel from your Hosted.com® Dashboard
4. Click on Manage Services to view the sub-dropdown menu and select the hosting package for the domain you want to work with – in our example we are using WordPress Hosting.
5. Click the Manage button to the right of the domain name you want to access.
6. The display will now show Product Information, Quick Manage, Resource Usage and Site Statistics for that domain name.
7. Under Product Information, scroll down to Control Panel, which will display cPanel to the right, and click on the Login button.
8. The cPanel Dashboard will now be displayed.
