hi guys, am having a problem creating a user account from my application. it`s giving me this error, my smtp is configured. am confused. Server Error in '/CSApplication' Application. Mailbox unavailable. The server response was: 5.7.1 Unable to relay for chivaap1010@yahoo.com Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Net.Mail.SmtpFailedRecipientException: Mailbox unavailable. The server response was: 5.7.1 Unable to relay for chivaap1010@yahoo.comSource Error: