To fix the problem, you must be the executor of the server and you should call at sbcglobal.net customer support phone number . If the error has been appearing continuously for a period of more than 48-hours and you have already given enough time to correct the error, then go through the following practices when sending an email through your Yahoo Mail account The Best. Have the policy to remove email addresses that result in errors or bounces. Be sure to send a good email reputation. This is because Yahoo reviews the IP submitted for distribution issues and based on which they can change your reputation in your system. To discuss your issue, fill out a new sender application through the link below. However, even if you have a good email sending reputation, users may vote for your email as spam, and which may affect your reputation, resulting in such errors. Ensure that spammers are not misusing your email server. If you are using a shared IP address, then mail tra