How to Fix SBCGlobal Email Error Code 550?

How to Fix SBCGlobal Email Error Code 550?
Dec 17, 2022      Luis Parker      SBCGlobal email

SBCGlobal is the most popular and easy-to-use communication interface that has helped millions reach out to each other. From sending to receiving emails with documents, presentations, proposals, and many more, it has become super easy to stay connected with anyone anywhere in the world. Despite its unmatchable features and growing popularity, users face a few glitches while working on it. One such issue is the SBCGlobal Email Error Code 550, which usually occurs when a user tries to send emails to an unverified email address. This article will cover end-to-end solutions to terminate SBCGlobal email error 550.

Possible Reasons Behind SBCGlobal Email Error 550

Let’s take a short look at the list of possible reasons due to why a user may encounter error code 550 in the SBCGlobal email account;

  • The recipient’s email address is wrong or does not exist.
  • The recipient’s email server fails to identify your SBCGlobal email address.
  • Your email account domain name is invalid or blocked.
  • If you are using your email client through a different IP address, then it can lead to SBCGlobal email error 550.

Common Phrases Indicating SBCGlobal Email Error 550

Let’s take a look at the common and different phrases in which SBCGlobal email error code 550 arises;

  • Email error code 550: 5.1.0 Address Rejected
  • Email error code 550: 5.1.1
  • Email error code 550: Denied by policy
  • Email error code 550: 5.4.1
  • Email error code 550: 5.7.0 Message size violation
  • Email error code 550: 5.7.1 Access denied
  • Email error code 550: Administrative prohibition
  • Email error code 550: Host unknown

Solutions to Terminate SBCGlobal Email Error Code 550

Given below are the troubleshooting solutions that you can perform step-by-step to eliminate error code 550 in the SBCGlobal email account;

Solution 1. Double-check the recipient’s email address

If you are typing the recipient’s email address in a hurry, there is a higher possibility of typing errors. Therefore, we suggest you double-check or verify the recipient’s email address is correct and that there are no misspellings.

Apart from this, you must also re-confirm the email address with the recipient, as the recipient might have given you the wrong email address.

Solution 2. Resend the Email After Sometime

Possibly, the recipient’s email server is temporarily down due to several major reasons. In that case, you must inform the recipient that the server may be down and ask them for an alternative email address, or instead, try waiting for a few hours until the server issue gets eliminated and try again later.

Solution 3. Fixed The Blocked Authentication

If the SMTP settings or authentication is incorrect, you may face various issues in sending new emails. Therefore, you must double-check that the authentication is not blocked;

  • Firstly, launch the email application, and check the SMTP authentication settings.
  • Thereon, check mark the box next to the “My Server Requires Authentication” option.
  • Moving ahead, you must set up an SBCGlobal email account with any third-party email application, and then the authentication process will start automatically.
  • Once the authentication process ends, click on the “Yes” option to confirm the configuration.

Once you are done with the steps mentioned above, verify if the SBCGlobal email error code 550 has been terminated. In case the error persists, then try the next solution.

Solution 4. Check the Email Account Blacklist Settings

If you have added the recipient’s email address to the blocklist, it might disallow you to send new emails to that specific email address. Therefore, we suggest you check the blocklist settings on your SBCGlobal email account.

Remove that account immediately if you notice that the email address is added to the block list. This step will enable you to send or receive new emails from the email account.


We hope you find this blog interesting and informative. You can easily perform the above mentioned solutions to fix SBCGlobal email error code 550. If the solutions mentioned above do not work for you, and if the error still exists, then you can get in touch with our email experts through mail at Our professional Sbcglobal email experts are available 24/7 at the help desk to answer your query and deliver the best solution.

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