Error in sending Email

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When I was trying to Send an Email to Registered email Id In forgot Password Page ,then i got this Error:
The SMTP server requires a secure connection or the client was not authenticated. The server response was Authentication Required.

Code Is:

C#

public void Sendemail()
  {
          MailMessage message = new MailMessage();
          message.From = new MailAddress("admin@gmail.com", "admin");
          message.To.Add(Usertxt.Text);
          message.Subject = "Verification Email";
          message.Body = "Your Password is";
          message.IsBodyHtml = true;
          SmtpClient smtp = new SmtpClient();
          smtp.Host = "smtp.gmail.com";
          smtp.Port = 587;
          smtp.Credentials = new System.Net.NetworkCredential("admin@gmail.com", "admin123");
          smtp.EnableSsl = true;
          smtp.Send(message);
  }

Posted 11-Aug-15 22:12pm

Member 11804811

Updated 11-Aug-15 23:07pm

Suvendu Shekhar Giri

v3

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Comments

F-ES Sitecore 12-Aug-15 4:21am

This is asked daily, google for "asp.net send email gmail" for the many reasons that this might fail. It is normally because you haven't configured your account to allow mails to be automated, or because the account needs to pass a manual captcha. Ultimately you shouldn't be sending email thorough gmail, use your web host's SMTP server.

5 solutions

Solution 2

Try This...

MailMessage message = new MailMessage();
MailAddress fromAddress = new MailAddress("admin@gmail.com");

message.From = fromAddress;
message.To.Add(Usertxt.Text);

message.Subject = "Verification Email";
message.IsBodyHtml = true;

SmtpClient smtpClient = new SmtpClient("smtp.gmail.com");
smtpClient.Port = 587;
smtpClient.EnableSsl = true;
smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;

smtpClient.UseDefaultCredentials = false;

smtpClient.Credentials = new System.Net.NetworkCredential("admin@gmail.com", "admin123");

smtpClient.Send(message);

Posted 11-Aug-15 23:28pm

RAJKUMAR M G

Comments

Member 11804811 12-Aug-15 10:42am

Thanks for Comment. I will try this code.

Solution 1

I think the credentials you are using are incorrect. Please verify once again.

Refer my previous answer with a fully working example - sending email to gmail from asp.net[^]

Posted 11-Aug-15 23:15pm

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

Comments

Member 11804811 12-Aug-15 10:42am

Thanks for Comment. I will try this code

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 12-Aug-15 11:09am

Most welcome.

Solution 3

refer Gmail Error :The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required[^]

Posted 11-Aug-15 23:30pm

DamithSL

Solution 4

Make sure your username/password credentials are fine. They seem to be causing the trouble and the server is not authenticating your request to send the email. You may want to recheck them in case of any problem.

My previous articles cover this topic in detail, please read them:
Sending emails over .NET framework, and general problems – using C# code[^]
Sending Emails Easily Using ASP.NET Helpers[^]

Posted 11-Aug-15 23:31pm

Afzaal Ahmad Zeeshan

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Member 11804811 · Accepted Answer · 2015-08-12T08:34:00

Thanks For all for ur Solution.I find the solution.
Changed setting of gmailid.
Allow unsecure Applogin ---> ON.

For more details,Please Refer Following Article.
http://www.smarterasp.net/support/kb/a1546/send-email-from-gmail-with-smtp-authentication-but-got-5_5_1-authentication-required-error.aspx[^]

Error in sending Email

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