sending mail in mvc

Khushboo Kumari

8y1.1k.NET

please help me to solve

error->Additional information: The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required.

my code is like below

[HttpPost]
public ViewResult Index(mail_sending.Models.MailModel _objModelMail)
{
if (ModelState.IsValid)
{
MailMessage mail = new MailMessage();
mail.To.Add(_objModelMail.To);
mail.From = new MailAddress(_objModelMail.From);
mail.Subject = _objModelMail.Subject;
string Body = _objModelMail.Body;
mail.Body = Body;
mail.IsBodyHtml = true;
SmtpClient smtp = new SmtpClient();
smtp.Host = "smtp.gmail.com";
smtp.Port = 587;
smtp.UseDefaultCredentials = false;
smtp.Credentials = new System.Net.NetworkCredential("[email protected]", "shushiladevi"); // Enter seders User name and password
smtp.EnableSsl = true;
smtp.Send(mail);
return View("Index", _objModelMail);
}
else
{
return View();
}
}

4 Replies

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Amit Gupta8y ago
Accepted answer
You need to alow lessSecureApp to true in the below link and then try https://myaccount.google.com/security
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Khushboo Kumari8y ago
thanks to all
0
Rajeesh Menoth8y ago
Hi,

5.5.1 Error is related to "SMTP Server Requires a Secure Connection" . So please check the following steps.
Enter the correct login password.
To remove 2-Step Verification.
You have to enable login from other timezone / ip for your google account.To do this follow the link and allow access by clicking the continue button.
Go to security settings at the following link and enable less secure apps . So that you will be able to login from all apps.
Reference :

http://www.c-sharpcorner.com/blogs/smtp-server-requires-a-secure-connection1

http://www.c-sharpcorner.com/UploadFile/2a6dc5/how-to-send-a-email-using-Asp-Net-C-Sharp/
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Srikant Maruwada8y ago
Please refer the below article.

https://www.emailarchitect.net/easendmail/kb/csharp.aspx?cat=2
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