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am sending a mail form,that time i have generate an error ...
the error show below;

'The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required.'

Please Help me..any reference?
it's very urgent....
Updated 1-Jan-12 18:32pm

1 solution

Most SMTP server require you to be authenticated before sending mails through them (avoiding and blocking spammers).

See this :[^]
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Mohammed Asif.K 2-Jan-12 0:34am    
My Code Like This:
public bool Send_Email_touser(string name, string email, string mobile, string Message)
bool status = false;

string msg = "<html><body>Hi " + name + "," + "<br/>"
+ "Thank's for contacting with ''." + "<br/>"
+ "We are eager to assist you and serve you better." + "<br/>"
+ "It's an easy and faster approach to reach your properties at the click of your mouse." + "<br/>"
+ "Regards," + "<br/>" + "<br/>" + " | " + "<br/>"
+ "" + "<br/>"
+ "</body></html>";

MailHelper.SendMailMessage(ConfigurationManager.AppSettings["weddingle_mail"].ToString(), email, "", "", "[] - Contact Us", msg);
catch (Exception ex)
lbl_Exception_Mail.ForeColor = Color.Red;
lbl_Exception_Mail.Text = ex.ToString();
return status;
Mohammed Asif.K 2-Jan-12 0:35am    
So This Code How can i change?
Mehdi Gholam 2-Jan-12 0:42am    
Read the link provided.
Sergey Alexandrovich Kryukov 2-Jan-12 0:48am    
Sure, a 5.
Happy New Year!
Mehdi Gholam 2-Jan-12 0:50am    
Cheers, and all the best

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