通过 gmail 使用 System.Net.Mail 发送电子邮件

Question

我想通过 gmail 服务器发送电子邮件。 我已经输入了以下代码，但在发送时卡住了。 任何想法请....

MailMessage mail = new MailMessage();

        mail.From = new System.Net.Mail.MailAddress("apps@xxxx.com");

        //create instance of smtpclient
        SmtpClient smtp = new SmtpClient();
        smtp.Port = 465;
        smtp.UseDefaultCredentials = true;

        smtp.Host = "smtp.gmail.com";            

        smtp.EnableSsl = true;

        //recipient address
        mail.To.Add(new MailAddress("yyyy@xxxx.com"));

        //Formatted mail body
        mail.IsBodyHtml = true;
        string st = "Test";

        mail.Body = st;
        smtp.Send(mail);

xxxx.com 是 Google 应用程序中的邮件域。 谢谢...

Answer 1

MailMessage mail = new MailMessage();
mail.From = new System.Net.Mail.MailAddress("apps@xxxx.com");

// The important part -- configuring the SMTP client
SmtpClient smtp = new SmtpClient();
smtp.Port = 587;   // [1] You can try with 465 also, I always used 587 and got success
smtp.EnableSsl = true;
smtp.DeliveryMethod = SmtpDeliveryMethod.Network; // [2] Added this
smtp.UseDefaultCredentials = false; // [3] Changed this
smtp.Credentials = new NetworkCredential(mail.From,  "password_here");  // [4] Added this. Note, first parameter is NOT string.
smtp.Host = "smtp.gmail.com";            

//recipient address
mail.To.Add(new MailAddress("yyyy@xxxx.com"));

//Formatted mail body
mail.IsBodyHtml = true;
string st = "Test";

mail.Body = st;
smtp.Send(mail);

Answer 2

我尝试使用上面的 C# 代码将邮件从 Gmail 发送到我的公司 ID。 在执行应用程序时，控制无限期地停止在语句smtp.Send(mail);

在谷歌搜索时，我遇到了一个类似的代码，它对我有用。 我在这里发布该代码。

class GMail
{
    public void SendMail()
    {  
        string pGmailEmail = "fromAddress@gmail.com";
        string pGmailPassword = "GmailPassword";
        string pTo = "ToAddress"; //abc@domain.com
        string pSubject = "Test From Gmail";
        string pBody = "Body"; //Body
        MailFormat pFormat = MailFormat.Text; //Text Message
        string pAttachmentPath = string.Empty; //No Attachments

        System.Web.Mail.MailMessage myMail = new System.Web.Mail.MailMessage();
        myMail.Fields.Add
            ("http://schemas.microsoft.com/cdo/configuration/smtpserver",
                          "smtp.gmail.com");
        myMail.Fields.Add
            ("http://schemas.microsoft.com/cdo/configuration/smtpserverport",
                          "465");
        myMail.Fields.Add
            ("http://schemas.microsoft.com/cdo/configuration/sendusing",
                          "2");
        //sendusing: cdoSendUsingPort, value 2, for sending the message using 
        //the network.

        //smtpauthenticate: Specifies the mechanism used when authenticating 
        //to an SMTP 
        //service over the network. Possible values are:
        //- cdoAnonymous, value 0. Do not authenticate.
        //- cdoBasic, value 1. Use basic clear-text authentication. 
        //When using this option you have to provide the user name and password 
        //through the sendusername and sendpassword fields.
        //- cdoNTLM, value 2. The current process security context is used to 
        // authenticate with the service.
        myMail.Fields.Add
        ("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1");
        //Use 0 for anonymous
        myMail.Fields.Add
        ("http://schemas.microsoft.com/cdo/configuration/sendusername",
            pGmailEmail);
        myMail.Fields.Add
        ("http://schemas.microsoft.com/cdo/configuration/sendpassword",
             pGmailPassword);
        myMail.Fields.Add
        ("http://schemas.microsoft.com/cdo/configuration/smtpusessl",
             "true");
        myMail.From = pGmailEmail;
        myMail.To = pTo;
        myMail.Subject = pSubject;
        myMail.BodyFormat = pFormat;
        myMail.Body = pBody;
        if (pAttachmentPath.Trim() != "")
        {
            MailAttachment MyAttachment =
                    new MailAttachment(pAttachmentPath);
            myMail.Attachments.Add(MyAttachment);
            myMail.Priority = System.Web.Mail.MailPriority.High;
        }

        SmtpMail.SmtpServer = "smtp.gmail.com:465";
        SmtpMail.Send(myMail);
    }
}

Answer 3

设置 smtp.UseDefaultCredentials = false 并使用 smtp.Credentials = new NetworkCredential(gMailAccount, password);

Answer 4

这对我有用：

        MailMessage message = new MailMessage("myemail@gmail.com", toemail, subjectEmail, comments);
        message.IsBodyHtml = true;

        try {
            SmtpClient client = new SmtpClient("smtp.gmail.com", 587);
            client.Timeout = 2000;
            client.EnableSsl = true;
            client.DeliveryMethod = SmtpDeliveryMethod.Network;
            //client.Credentials = CredentialCache.DefaultNetworkCredentials;
            client.UseDefaultCredentials = false;
            client.Credentials = new System.Net.NetworkCredential("myemail@gmail.com", "mypassord");
            client.Send(message);

            message.Dispose();
            client.Dispose();
        }
        catch (Exception ex) {
            Debug.WriteLine(ex.Message);
        }

但是（截至撰写本文时 - 2017 年 10 月）

您需要在“我的帐户”谷歌安全/隐私设置（ https://myaccount.google.com ）的“具有帐户访问权限的应用程序”选项中启用“允许安全性较低的应用程序”

Answer 5

我意识到这是一个非常古老的问题的答案，还有很多其他好的答案。 我发布此代码以包含其他用户发布的一些有用评论，例如使用语句和较新的方法，其中某些答案具有过时的方法。 此代码已于 2018 年 7 月 11 日进行了测试和工作。

如果通过您的 GMail 帐户发送，请确保从您的控制面板启用允许不太安全的应用程序

类代码 C#：

public class Email
{
public void NewHeadlessEmail(string fromEmail, string password, string toAddress, string subject, string body)
{
    using (System.Net.Mail.MailMessage myMail = new System.Net.Mail.MailMessage())
    {
        myMail.From = new MailAddress(fromEmail);
        myMail.To.Add(toAddress);
        myMail.Subject = subject;
        myMail.IsBodyHtml = true;
        myMail.Body = body;

        using (System.Net.Mail.SmtpClient s = new System.Net.Mail.SmtpClient("smtp.gmail.com", 587))
        {
            s.DeliveryMethod = SmtpDeliveryMethod.Network;
            s.UseDefaultCredentials = false;
            s.Credentials = new System.Net.NetworkCredential(myMail.From.ToString(), password);
            s.EnableSsl = true;
            s.Send(myMail);
        }
    }
}
}

类代码 VB：

Public Class Email    
Sub NewHeadlessEmail(fromEmail As String, password As String, toAddress As String, subject As String, body As String)
        Using myMail As System.Net.Mail.MailMessage = New System.Net.Mail.MailMessage()
            myMail.From = New MailAddress(fromEmail)
            myMail.To.Add(toAddress)
            myMail.Subject = subject
            myMail.IsBodyHtml = True
            myMail.Body = body

            Using s As New Net.Mail.SmtpClient("smtp.gmail.com", 587)
                s.DeliveryMethod = SmtpDeliveryMethod.Network
                s.UseDefaultCredentials = False
                s.Credentials = New Net.NetworkCredential(myMail.From.ToString(), password)
                s.EnableSsl = True
                s.Send(myMail)
            End Using

        End Using
    End Sub
End Class

用法 C#：

{
Email em = new Email();
em.NewHeadlessEmail("myemail@gmail.com", "password", "recipient@email.com", "Subject Text", "Body Text");
}

用法 VB：

Dim em As New Email
em.NewHeadlessEmail("myemail@gmail.com", "password", "recipient@email.com", "Subject Text", "Body Text")

Answer 6

使用端口号 587

使用以下代码，它将成功运行。

MailMessage mail = new MailMessage();
mail.From = new MailAddress("abc@mydomain.com", "Enquiry");
mail.To.Add("abcdef@yahoo.com");
mail.IsBodyHtml = true;
mail.Subject = "Registration";
mail.Body = "Some Text";
mail.Priority = MailPriority.High;

SmtpClient smtp = new SmtpClient("smtp.gmail.com", 587);
//smtp.UseDefaultCredentials = true;
smtp.Credentials = new System.Net.NetworkCredential("xyz@gmail.com", "<my gmail pwd>");
smtp.EnableSsl = true;
//smtp.DeliveryMethod = SmtpDeliveryMethod.Network;

smtp.Send(mail);

但是，使用 gmail 存在问题。 电子邮件将成功发送，但收件人收件箱的“发件人地址”中将包含 gmail 地址，而不是代码中提到的“发件人地址”。

要解决此问题，请按照以下链接中提到的步骤操作。

http://karmic-development.blogspot.in/2013/10/send-email-from-aspnet-using-gmail-as.html

在执行上述所有步骤之前，您需要验证您的 Gmail 帐户以允许访问您的应用程序和设备。 请在以下链接中检查帐户身份验证的所有步骤：

http://karmic-development.blogspot.in/2013/11/allow-account-access-while-sending.html

Answer 7

    ActiveUp.Net.Mail.SmtpMessage smtpmsg = new ActiveUp.Net.Mail.SmtpMessage();
    smtpmsg.From.Email = "abcd@test.com";
    smtpmsg.To.Add(To);
    smtpmsg.Bcc.Add("vijay@indiagreat.com");
    smtpmsg.Subject = Subject;
    smtpmsg.BodyText.Text = Body;

    smtpmsg.Send("mail.test.com", "abcd@sss.com", "user@1234", ActiveUp.Net.Mail.SaslMechanism.Login);

Answer 8

简单的代码工作

MailMessage mail = new MailMessage();
mail.To.Add(to);
mail.From = new MailAddress(from);
mail.Subject = subject;
mail.Body = body;
mail.IsBodyHtml = true;
SmtpClient smtp = new SmtpClient("smtp.gmail.com",587);
smtp.EnableSsl = true;
smtp.UseDefaultCredentials = false;
smtp.Credentials = new System.Net.NetworkCredential(address, password);
smtp.Send(mail);