If the user is unable to send email, the email program highlights an error notification showing “error code 0x800CCC79 or error code 550”. The user can even come across notification like “unknown local user or recipient not authorized”. Behind the occurrence of this technical fault, there exists three basic reasons. The reasons are well defined below along with the troubleshooting steps:
- Authentication failure:
If the user is trying hard to send the mails from a valid mail to a valid email address and at that point you came across a notification highlighting “error code 550 or 0x800CCC79” then the very first thing to look after is that the email program is properly set up for the SMTP authentication.
For protecting the respective email server from the abuse coming from the spammers, so being a tech support firm, we allow only to our respective customers from using it. so the techies at our firm move ahead by insisting that all the mails sent using the Yahoo holds SMTP authentication for proving where they basically turned up from .
- From an Invalid Address
If the user is trying to send mail from an email address that is invalid and they will get a notification highlighting “Server response: 550 recipient not authorized”. So if address you have selected for sending the email does not appears to be valid then the server will prohibit the sending of the emails. So for that have a look over the following:
- The address that you have selected for sending was properly spelled when you set up the respective mail account.
- It take a day time for the activation of the new email address so at least give 24 hour time after the email address is created.
- To an Invalid Address
There are chances that the place from where you are sending the email is valid and the main problem is in the mail address to which the mail is being sent to. When your message won’t be sent then you will come across a notification of failure delivery status notification from email server notification.
The steps may be bit confusing to follow but its appropriate as it is the exact solution to the problem. For more detailed solution, get connected to techies for resolving this particular technical glitch by dialing Yahoo Mail Customer Service Phone Number usa or Yahoo Mail Customer Care Toll Free Number 1-888-223-8982.