Error is coming when i send email

Error is coming when i send email to a guy, the error is :-

"This is an automatically generated Delivery Status Notification

Delivery to the following recipient failed permanently:"

Whats the solution?

Jay

 

Maybe the email address is not valid.

 

try to send from another mail server

 

You are using which mail?

 

This happens at some point with every address you may use, however, I'm not sure exactly why it happens.

 

try sending a test email to someone else and see if it works or try sending after sometime.