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

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am sending a mail form Asp.net,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....

Posted 1-Jan-12 18:29pm

Mohammed Asif.K

Updated 1-Jan-12 18:32pm

Mehdi Gholam

v3

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Mehdi Gholam · Answer 1 · 2012-01-01T18:32:00

Solution 1

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

See this : http://www.aspnettutorials.com/tutorials/email/email-auth-aspnet2-csharp.aspx[^]

Posted 1-Jan-12 18:32pm

Mehdi Gholam

Comments

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;
try
{

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

Mehdi Gholam 2-Jan-12 0:50am

Cheers, and all the best

Member 8049970 18-Jan-13 8:25am

Oops! Sorry, an error occurred.

Makwana Kishor 25-Apr-13 7:15am

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

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

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