Error in smtp server

Question

0.00/5 (No votes)

See more:

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

C#

SmtpClient smtp = new SmtpClient();
smtp.Host = "smtp.gmail.com";
smtp.EnableSsl = true;
NetworkCredential NetworkCred = new NetworkCredential("myemail", "<password>");
smtp.UseDefaultCredentials = true;
smtp.Credentials = NetworkCred;
smtp.Port = 587;
smtp.Send(mm);

How do I solve this error

Posted 6-Jul-14 7:28am

polkj

Updated 6-Jul-14 7:37am

DamithSL

v2

Add a Solution

Comments

[no name] 6-Jul-14 13:31pm

smtp.UseDefaultCredentials = false;

Thomas Daniels 6-Jul-14 13:31pm

Is the email address in the format email@gmail.com or just email? If it is just email, you should use email@gmail.com. And, as Wes Aday said, you should set UseDefaultCredentials to false.

1 solution

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 · Answer 1 · 2014-07-06T07:33:00

Solution 1

try below

C#

SmtpClient smtp= new SmtpClient("smtp.gmail.com", 587);
smtp.EnableSsl = true;
smtp.UseDefaultCredentials = false;
smtp.Credentials = new NetworkCredential("username", "pass");
smtp.Send(mm);

Posted 6-Jul-14 7:33am

DamithSL

Updated 6-Jul-14 7:37am

v2

Comments

polkj 6-Jul-14 13:55pm

can this be used for hotmail or yahoo?

DamithSL 6-Jul-14 22:13pm

for credentials you need to give gmail user name and password if you are using gmail smtp ("smtp.gmail.com")