.net mail process

ranjan sahoo

hiiii.
i have creating a .net windows application mailing syatem. but when i am executing the program it will show an error message
message is

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

how to solve it .? and my mail will properly process?

8 Replies

Know the answer? Post it — somebody with the same question will find it here.

Iftikar Hussain13y ago
Accepted answer
Hi,
If you are using GMAIL SMTP server, then it is required to provide credentials.

SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587);
smtp.EnableSsl = true;
smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
smtp.UseDefaultCredentials = false;
smtp.Credentials = new System.Net.NetworkCredential("my user", "my pass");

Regards,
Iftikar
0
Nitesh Kejriwal13y ago
Great. Please mark answer as Accepted answer for others to get the help as well :)
0
ranjan sahoo13y ago
Thank u sir. am happy now.
0
ranjan sahoo13y ago
Yes now message is going. Thank u so much
0
ranjan sahoo13y ago
UseDefaultCredentials = false; is it necessory to put credential ?
0
Nitesh Kejriwal13y ago
You did not pass the credentials to send email via Gmail. Please see the below link -

http://www.niteshluharuka.com/2012/11/how-to-send-email-using-gmail-server/
0
ranjan sahoo13y ago
private void button1_Click(object sender, EventArgs e) { MailAddress from = new MailAddress("my [email protected]"); MailAddress to = new MailAddress("[email protected]"); List cc = new List(); cc.Add(new MailAddress("[email protected]")); SendEmail("Want to test this damn thing", from, to, cc); } protected void SendEmail(string _subject, MailAddress _from, MailAddress _to, List _cc) { string Text = ""; SmtpClient mailClient = new SmtpClient("smtp.gmail.com"); mailClient.Port = 587; mailClient.EnableSsl = true; MailMessage msgMail; Text = "Stuff"; msgMail = new MailMessage(); msgMail.From = _from; msgMail.To.Add(_to); foreach (MailAddress addr in _cc) { msgMail.CC.Add(addr); } //if (_bcc != null) //{ // foreach (MailAddress addr in _bcc) // { // msgMail.Bcc.Add(addr); // } //} msgMail.Subject = _subject; msgMail.Body = "
Dear Sir,
"; // msgMail.IsBodyHtml = true; mailClient.Send(msgMail); msgMail.Dispose(); } }
0
Sanjeeb Lenka13y ago
plz share your code.
0