The mail could not be sent to the recipients because of the mail server failure.

Hi,

  I am configured Database Mail,But i am getting below error while i am sending Test mail.

Message
The mail could not be sent to the recipients because of the mail server failure. (Sending Mail using Account 4 (2014-03-10T15:54:11). Exception Message: Cannot send mails to mail server. (The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.1 Client was not authenticated).
)

Pls help me,

Thanks - SelvaKumarSubramaniam.Please MARK AS ANSWER, if my answer is useful to U.