如何通过Gmail使用C＃发送电子邮件

Johnny 发表于 Dev

强尼

尝试通过Web服务发送电子邮件时出现错误。我尝试过启用不安全的应用程序访问权限，从而禁用两步验证并通过网络浏览器登录帐户。SO的所有解决方案都没有对我有用。我仍然得到：

错误：System.Net.Mail.SmtpException：SMTP服务器需要安全连接，或者客户端未通过身份验证。服务器响应为：5.5.1需要身份验证。

我该怎么做才能解决此问题？

namespace EmailService
{
    public class Service1 : IService1
    {    
        public string SendEmail(string inputEmail, string subject, string body)
        {
            string returnString = "";
            try
            {
                MailMessage email = new MailMessage();
                SmtpClient smtp = new SmtpClient();
                smtp.Host = "smtp.gmail.com";

                // set up the Gmail server
                smtp.EnableSsl = true;
                smtp.Port = 587;
                smtp.Credentials = new System.Net.NetworkCredential("[email protected]", "mypassword");
                smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
                smtp.UseDefaultCredentials = false;

                // draft the email
                MailAddress fromAddress = new MailAddress("[email protected]");
                email.From = fromAddress;
                email.To.Add(inputEmail);
                email.Subject = body;
                email.Body = body;

                smtp.Send(email);

                returnString = "Success! Please check your e-mail.";
            }
            catch(Exception ex)
            {
                returnString = "Error: " + ex.ToString();
            }
            return returnString;
        }
    }
}

埃格巴尔·索哈比（Eghbal Sohrabi）

只需走到这里：安全性较低的应用程序，使用您的电子邮件和密码登录即可使用c＃代码发送邮件，然后选择Turn On。

另外，请转到此链接，然后单击继续允许访问您的Google帐户

我也编辑一下：

public string sendit(string ReciverMail)
{
    MailMessage msg = new MailMessage();

    msg.From = new MailAddress("[email protected]");
    msg.To.Add(ReciverMail);
    msg.Subject = "Hello world! " + DateTime.Now.ToString();
    msg.Body = "hi to you ... :)";
    SmtpClient client = new SmtpClient();
    client.UseDefaultCredentials = true;
    client.Host = "smtp.gmail.com";
    client.Port = 587;
    client.EnableSsl = true;
    client.DeliveryMethod = SmtpDeliveryMethod.Network;
    client.Credentials = new NetworkCredential("[email protected]", "YourPassword");
    client.Timeout = 20000;
    try
    {
       client.Send(msg);
        return "Mail has been successfully sent!";
    }
    catch (Exception ex)
    {
        return "Fail Has error" + ex.Message;
    }
    finally
    {
       msg.Dispose();
    }
}

如果以上代码无效，请尝试将其更改为以下代码：

    SmtpClient client = new SmtpClient();
    client.Host = "smtp.gmail.com";
    client.Port = 587;
    client.EnableSsl = true;
    client.DeliveryMethod = SmtpDeliveryMethod.Network;
    client.UseDefaultCredentials = false;
    client.Credentials = new NetworkCredential("[email protected]", "YourPassword");

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