我想通过gmail服务器发送电子邮件。我已经输入了以下代码，但它在发送时卡住了。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应用中的邮件域。 感谢...
答案 0 :(得分：77)
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);
答案 1 :(得分：13)
我尝试使用上述C＃代码将邮件从Gmail发送到我的公司ID。在执行应用程序时，控件在语句smtp.Send(mail);
谷歌搜索时，我遇到了类似的code，这对我有用。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);
}
}
答案 2 :(得分：7)
设置smtp.UseDefaultCredentials = false并使用 smtp.Credentials =新的NetworkCredential（gMailAccount，密码）;
答案 3 :(得分：2)
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”Google安全/隐私设置（https://myaccount.google.com）
中选择“具有帐户访问权限的应用”选项内的“允许安全性较低的应用”答案 4 :(得分：2)
我意识到这是一个非常古老的问题的答案，还有许多其他好的答案。我将发布此代码，以包含其他用户发布的一些有用的注释，例如使用语句和更新的方法，其中某些答案已过时。该代码已通过测试，并于2018年7月11日生效。
如果通过您的GMail帐户发送邮件，请确保已从Allow less secure apps启用control panel
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);
}
}
}
}
VB类代码：
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
使用C＃：
{
Email em = new Email();
em.NewHeadlessEmail("myemail@gmail.com", "password", "recipient@email.com", "Subject Text", "Body Text");
}
使用VB：
Dim em As New Email
em.NewHeadlessEmail("myemail@gmail.com", "password", "recipient@email.com", "Subject Text", "Body Text")
答案 5 :(得分：1)
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，但收件人收件箱中的gmail地址将在“发件人地址”中，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进行操作。
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，您需要对您的Gmail帐户进行身份验证，以允许访问您的应用程序以及设备。请通过以下链接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
答案 6 :(得分：0)
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);
答案 7 :(得分：0)
简单的代码有效
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);