服務器響應是：5.7.7本地域中的發件人未知

Question

當我試圖通過SMTP服務器發送郵件一個例外即將到來。 這裏是例外：

System.Net.Mail.SmtpException: Transaction failed. 
The server response was: 5.7.7 Sender Unknown in Local Domain . at 
System.Net.Mail.MailCommand.CheckResponse(SmtpStatusCode statusCode, String response) at 
System.Net.Mail.MailCommand.Send(SmtpConnection conn, Byte[] command, String from) at 
System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String 
deliveryNotify, SmtpFailedRecipientException& exception) at System.Net.Mail.SmtpClient.Send(MailMessage 
message) at _Default.Button1_Click1(Object sender, EventArgs e) 
in d:\pjt\mail_check\Default.aspx.cs:line 39 

Answer 1

入住這link。它可能會有所幫助