Yahoo mail support

How to fix Yahoo Email error 550?

“Yahoo email error 550” essentially alludes due to the SMTP mistake codes which happen when the active messages of the clients are not conveyed to the concerned email beneficiary. It is better not to send an email when this issue shows up as it can prompt perpetual harm to your letter drop. This error can be also be shown by your system when you can’t send email, your email program may show a mistake message containing “error code 550” or “error code 0x800CCC79”. It might likewise say “recipient Not Authorized” or “Unknown Local User”. If you are also unable to send/receive emails from your Yahoo email and you are really frustrated by this issue and moreover you are getting Yahoo HTTP error 500 (internal server error) and you are not able to troubleshoot it then you should get in touch with the experts to get Yahoo technical support without any delay. If you want to deal with this situation manually then you can follow the steps provided by our experts below.

Causes of the issue

  • You have typed an invalid email address of the recipient.
  • This issue also arises when your ID is in Spamhaus and your IP address has been blocked by Yahoo.
  • When you have send the email the authentication of the Domain’s DKIM has failed.
  • There is an invalid SMTP connection.


  • User’s system is showing this error again and again.
  • Your emails are spammed.
  • You are not able to access your email id for a short period.
  • You are not able to send any emails and not able to receive emails either.

Steps to solve Yahoo Email error 550

Step 1: Firstly, users should be an administrator of the server if they want to fix this problem.

Step 2: Remove email addresses which are causing the errors and make sure that you have not typed the invalid email address of the recipient.

Step 3: Also ensure that your IP address isn’t in Spamhaus and has not been marked as a spam.

Step 4: Also make sure that the SMTP connections are correct and you are not having SMTP errors such as 4xx and 5xx which can create these errors. So make sure that you are not stuck in these situations and the connection has not declined.

Step 5: Also make sure that you are not sending any emails which contain content that is not allowed by Yahoo policies which can result in authentication failure of the domain. So if you face any issue which you are not able to troubleshoot then you should take Yahoo mail support from qualified experts immediately.

For immediate support call us on Yahoo support number toll-free

If you are still not able to solve the problem even after following the steps or you have stuck at any particular step then contact the experts via Yahoo support number toll-free and you can reach us anytime as we are available 24X7.

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