I am getting error in email sending

Question

1.00/5 (2 votes)

See more:

this is my code for email notification-

C#

NetworkCredential smtpCreds = new NetworkCredential("hostemail", "hostpassword");
        SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587);
        smtp.EnableSsl = true;
        smtp.UseDefaultCredentials = false;
        //  smtp.Credentials = new NetworkCredential(TextBox1.Text, TextBox1.Text);
        MailMessage mail = new MailMessage("xxxxxxxx@gmail.com", Emailtxt.Text, "Registration Details", bodytxt.Text);
        smtp.Send(mail);

Error in my code is-
The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required.

[SmtpException: 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]
   System.Net.Mail.MailCommand.CheckResponse(SmtpStatusCode statusCode, String response) +1450559
   System.Net.Mail.MailCommand.Send(SmtpConnection conn, Byte[] command, String from) +41
   System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, SmtpFailedRecipientException& exception) +97
   System.Net.Mail.SmtpClient.Send(MailMessage message) +1757
   UserReg.Submitbtn_Click(Object sender, EventArgs e) in c:\HILProject\project4\UserReg.aspx.cs:42
   System.Web.UI.WebControls.Button.OnClick(EventArgs e) +118
   System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +112
   System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5563

[Edit]Email removed to avert spambots[/Edit]

Posted 8-May-14 6:47am

Ashwini Thakare

Updated 8-May-14 6:51am

CHill60

v3

Add a Solution

Comments

CHill60 8-May-14 12:52pm

I would suggest that the credentials you are supplying are incorrect

2 solutions

Solution 1

Try this. hope this link helps you.

http://stackoverflow.com/questions/20906077/gmail-error-the-smtp-server-requires-a-secure-connection-or-the-client-was-not[^]

Posted 8-May-14 7:02am

Jagbir Saini

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

DamithSL · Accepted Answer · 2014-05-24T06:23:00

Solution 4

you need to set smtp.Credentials and remove the line smtp.UseDefaultCredentials = false;

C#

NetworkCredential smtpCreds = new NetworkCredential("username", "pw");
SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587);
smtp.EnableSsl = true;
smtp.Credentials = smtpCreds;
MailMessage mail = new MailMessage("xxxxxxxx@gmail.com", Emailtxt.Text, "Registration Details", bodytxt.Text);
smtp.Send(mail);

Posted 24-May-14 6:23am

DamithSL

Comments

Ashwini Thakare 26-May-14 1:06am

thanks for your suggestion.
It worked.
thanks a lot

DamithSL 26-May-14 1:11am

You are welcome!