payment errors

System.Net.Mail.SmtpException: Bad sequence of commands. The server response was: This mail server requires authentication when attempting to send to a non-local e-mail address. Please check your mail client settings or contact your administrator to verify that the domain or address is defined for this server. at System.Net.Mail.RecipientCommand.CheckResponse(SmtpStatusCode statusCode, String response) at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, SmtpFailedRecipientException& exception) at System.Net.Mail.SmtpClient.Send(MailMessage message) at ContactUs.Button1_Click(Object sender, EventArgs e) Authentication failed!!! This card is deactivated for 3D Secure Service to prevent unauthorised use. Please contact Corporation Bank Customer Service for activating this card again. Redirecting to Merchant Website. Sorry, your payment did not go through The Bank has declined your Transaction. The possible reasons are listed below. If card payment: a) Invalid Card Details b) Card has expired c) Insufficient funds d) VBV/3D Secure Authentication Unsuccessful If other payment: a) Insufficient funds b) Incorrect Transaction password We're sorry, but we were unable to complete your request. When reporting this error to Blogger Support or on the Blogger Help Group, please: Describe what you were doing when you got this error. Provide the following error code. bX-ryzmlf This information will help us to track down your specific problem and fix it! We apologize for the inconvenience. Down for Scheduled Maintenance Please stay tuned!!!