Outlook Express Error "550-Relaying not Allowed"

What does this mean “550-Relaying not Allowed”?

This is an error message occur in Outlook Express. In Outlook there is a mail server  called “SMTP authentication” as a safeguard, which perform a query to the other mail server with respect to password at the time of sending emails. That takes guarantees for no unauthorized user can send an email to your mailbox.

 This error message comes from the mail server not from the “Outlook Express” itself. This means that when an SMTP mail server does not recognize you as an authorized person, at that time it rejects your message and shows an error.  If you directly connect to the Internet Service Provider, then it recognizes those whose IPs are accepted and added to the accepted list by configuring their SMTP server. If you are using multiple ISPs, then it is possible to meet this problem.

There is one more reason for facing this issue is due to the antivirus software. Antivirus configures Outlook Express by using a local proxy for the SMTP Server. So, there is no need to scan email in order to protect your computer from any outside threats (like a virus). From your antivirus you should disable the option of scanning e-mail and re-enter the accurate name for the SMTP server.

How to fix  '550- Relaying not Allowed ' error ?

The error message having number 0x800CCC79 is received when using “Outlook Express”. This error  message comes from the server as a response (550 Relaying not Allowed) which shows what the actual problem is about. To resolve this problem you need to change the SMTP server for the mail account.

To change the SMTP Sever follow the steps given below:

•          Go to the mail account
•          Then click on Tools
•         Select  Accounts| <account name> Properties and then “Servers”