If you are using GoDaddy web hosting and MailMessage in ASP .NET to send emails you might see this error message:

553 sorry, your mail was administratively denied

This seem to be a change GoDaddy made within last few months, I have no idea why.

Solution:

Problem seem to be the FROM email address. The FROM email address must be an email address with the hosted domain to avoid this error. For example if you have a hosted domain yourdomain.com, your FROM email address should be something like username@yourdomain.com.

Here is an example code:

MailMessage myMessage = new MailMessage();
myMessage.From = “username@yourdomain.com”;
myMessage.To = “somebody@somebody.com”;
myMessage.Subject = “Hello”;
myMessage.BodyFormat = MailFormat.Html;
myMessage.Priority = MailPriority.Low;
myMessage.Body =”Hello there.”;
SmtpMail.SmtpServer = “relay-hosting.secureserver.net”;
SmtpMail.Send(myMessage);