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SMTP C# google-apps

通过 Google Apps 帐户通过 C# 发送电子邮件

发布于 2024-07-17 09:12:48 字数 1400 浏览 9 评论 0 原文

我有一个标准的 Google Apps 帐户。我已通过 Google Apps 设置了自定义域。当我使用 Gmail 界面时，我能够通过 Google Apps 成功发送和接收电子邮件。但是，我想通过代码发送电子邮件。为了尝试这个，我一直在尝试以下代码：

MailMessage mailMessage = new MailMessage();
mailMessage.To.Add("[email protected]");
mailMessage.Subject = "Test";
mailMessage.Body = "<html><body>This is a test</body></html>";
mailMessage.IsBodyHtml = true;

// Create the credentials to login to the gmail account associated with my custom domain
string sendEmailsFrom = "[email protected]";
string sendEmailsFromPassword = "password";
NetworkCredential cred = new NetworkCredential(sendEmailsFrom, sendEmailsFromPassword);

SmtpClient mailClient = new SmtpClient("smtp.gmail.com", 587);
mailClient.EnableSsl = true;
mailClient.DeliveryMethod = SmtpDeliveryMethod.Network;
mailClient.UseDefaultCredentials = false;
mailClient.Timeout = 20000;
mailClient.Credentials = cred;
mailClient.Send(mailMessage);

当到达 Send 方法时，会抛出一个异常，指出：

“SMTP 服务器需要安全的连接或客户端未连接已验证。服务器响应是：5.5.1 需要身份验证。”

如何通过 Google 通过我的自定义域发送电子邮件？

原文

I have a standard Google Apps account. I have setup a custom domain through Google Apps. I am able to send and receive emails successfully through Google Apps when I use the Gmail interface. However, I want to send an email via code. In order to attempt this, I have been trying the following code:

MailMessage mailMessage = new MailMessage();
mailMessage.To.Add("[email protected]");
mailMessage.Subject = "Test";
mailMessage.Body = "<html><body>This is a test</body></html>";
mailMessage.IsBodyHtml = true;

// Create the credentials to login to the gmail account associated with my custom domain
string sendEmailsFrom = "[email protected]";
string sendEmailsFromPassword = "password";
NetworkCredential cred = new NetworkCredential(sendEmailsFrom, sendEmailsFromPassword);

SmtpClient mailClient = new SmtpClient("smtp.gmail.com", 587);
mailClient.EnableSsl = true;
mailClient.DeliveryMethod = SmtpDeliveryMethod.Network;
mailClient.UseDefaultCredentials = false;
mailClient.Timeout = 20000;
mailClient.Credentials = cred;
mailClient.Send(mailMessage);

When the Send method is reached, an Exception is thrown that states:

"The SMTP server requires a secure
connection or the client was not
authenticated. The server response
was: 5.5.1 Authentication Required."

How do I send emails through my custom domain via Google?

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空名 2024-07-24 09:12:48

无需在代码中对所有 SMTP 设置进行硬编码。将它们放在 web.config 中。这样，您可以根据需要加密这些设置并即时更改它们，而无需重新编译应用程序。

<configuration>
  <system.net>
    <mailSettings>
      <smtp from="[email protected]" deliveryMethod="Network">
          <network host="smtp.gmail.com" port="587"
              userName="[email protected]" password="password"/>
      </smtp>
    </mailSettings>
  </system.net>
</configuration>

发送电子邮件时结束，只需在 SmtpClient 上启用 SSL：

var message = new MailMessage("[email protected]");
// here is an important part:
message.From = new MailAddress("[email protected]", "Mailer");
// it's superfluous part here since from address is defined in .config file
// in my example. But since you don't use .config file, you will need it.

var client = new SmtpClient();
client.EnableSsl = true;
client.Send(message);

确保您从尝试在 Gmail 中进行身份验证的同一电子邮件地址发送电子邮件。

注意：从 .NET 4.0 开始，您可以将 enableSsl="true" 插入到 web.config 中，而不是在代码中进行设置。

There is no need to hardcode all SMTP settings in your code. Put them in web.config instead. This way you can encrypt these settings if needed and change them on the fly without recompiling your application.

<configuration>
  <system.net>
    <mailSettings>
      <smtp from="[email protected]" deliveryMethod="Network">
          <network host="smtp.gmail.com" port="587"
              userName="[email protected]" password="password"/>
      </smtp>
    </mailSettings>
  </system.net>
</configuration>

End when you send email just enable SSL on your SmtpClient:

var message = new MailMessage("[email protected]");
// here is an important part:
message.From = new MailAddress("[email protected]", "Mailer");
// it's superfluous part here since from address is defined in .config file
// in my example. But since you don't use .config file, you will need it.

var client = new SmtpClient();
client.EnableSsl = true;
client.Send(message);

Make sure that you're sending email from the same email address with which you're trying to authenticate at Gmail.

Note: Starting with .NET 4.0 you can insert enableSsl="true" into web.config as opposed to setting it in code.

回复收藏 0 原文

时光沙漏 2024-07-24 09:12:48

这就是我在 WPF 4

SmtpClient client = new SmtpClient();
client.Credentials = new NetworkCredential("[email protected]", "P@$w0rD");
client.Port = 587;
client.Host = "smtp.gmail.com";
client.EnableSsl = true;

try 
{
    MailAddress maFrom = new MailAddress("[email protected]", "Sender's Name", Encoding.UTF8),
    MailAddress maTo = new MailAddress("[email protected]", "Recipient's Name", Encoding.UTF8);
    MailMessage mmsg = new MailMessage(maFrom, maTo);
    mmsg.Body = "<html><body><h1>Some HTML Text for Test as BODY</h1></body></html>";
    mmsg.BodyEncoding = Encoding.UTF8;
    mmsg.IsBodyHtml = true;
    mmsg.Subject = "Some Other Text as Subject";
    mmsg.SubjectEncoding = Encoding.UTF8;

    client.Send(mmsg);
    MessageBox.Show("Done");
} 
catch (Exception ex) 
{
    MessageBox.Show(ex.ToString(), ex.Message);
    //throw;
}

Watch for Firewalls and Anti-Viruses 中使用的内容。这些令人毛骨悚然的事情往往会阻止应用程序发送电子邮件。
我使用 McAfee Enterprise，并且必须添加可执行文件名称（例如 Bazar.exe 和 Bazar.vshost.exe 的 Bazar.*）才能发送电子邮件...

This is what I use in WPF 4

SmtpClient client = new SmtpClient();
client.Credentials = new NetworkCredential("[email protected]", "P@$w0rD");
client.Port = 587;
client.Host = "smtp.gmail.com";
client.EnableSsl = true;

try 
{
    MailAddress maFrom = new MailAddress("[email protected]", "Sender's Name", Encoding.UTF8),
    MailAddress maTo = new MailAddress("[email protected]", "Recipient's Name", Encoding.UTF8);
    MailMessage mmsg = new MailMessage(maFrom, maTo);
    mmsg.Body = "<html><body><h1>Some HTML Text for Test as BODY</h1></body></html>";
    mmsg.BodyEncoding = Encoding.UTF8;
    mmsg.IsBodyHtml = true;
    mmsg.Subject = "Some Other Text as Subject";
    mmsg.SubjectEncoding = Encoding.UTF8;

    client.Send(mmsg);
    MessageBox.Show("Done");
} 
catch (Exception ex) 
{
    MessageBox.Show(ex.ToString(), ex.Message);
    //throw;
}

Watch for Firewalls and Anti-Viruses. These creepy things tend to block applications sending email.
I use McAfee Enterprise and I have to add the executable name (like Bazar.* for both Bazar.exe and Bazar.vshost.exe) to be able to send emails...

回复收藏 0 原文

如歌彻婉言 2024-07-24 09:12:48

将端口更改为465

回复收藏 0 原文

温折酒 2024-07-24 09:12:48

不需要做任何事情。只需首次登录您当前的帐户并按照说明操作即可。

你的问题将会解决。出现这种情况是因为您在Google Apps中创建了帐户但没有登录。只需登录并按照说明进行尝试即可。

回复收藏 0 原文

花之痕靓丽 2024-07-24 09:12:48

我的代码在 Port=587 上使用 TLS 连接到 smtp.google.com（SSL 应为端口 465），但仍需要 EnableSsl=true

SmtpClient smtp = new SmtpClient();
smtp.Host = "smtp.gmail.com";
smtp.Port = 587;
smtp.EnableSsl = true;
smtp.UseDefaultCredentials = false;
NetworkCredential credentials = new NetworkCredential();
credentials.UserName = "INSERT EMAIL";
credentials.Password = "INSERT PASSWORD";
smtp.Credentials = credentials;

MailAddress addressFrom = new MailAddress(credentials.UserName);
MailAddress addressTo = new MailAddress("INSERT RECIPIENT");
MailMessage msg = new MailMessage(addressFrom, addressTo);
msg.Subject = "SUBJECT"
msg.Body = "BODY";

smtp.Send(msg);

请注意您的 G SUITE 帐户上的这些重要先决条件

确保您使用的用户名已通过验证码验证首次登录时出现的测试。
确保帐户具有安全密码 - https:// support.google.com/accounts/answer/32040
确保为所需帐户启用了安全性较低的应用 - https://support.google.com/a/answer/6260879

My code is connecting to smtp.google.com using TLS on Port=587 (SSL should be port 465) but still needs EnableSsl=true

SmtpClient smtp = new SmtpClient();
smtp.Host = "smtp.gmail.com";
smtp.Port = 587;
smtp.EnableSsl = true;
smtp.UseDefaultCredentials = false;
NetworkCredential credentials = new NetworkCredential();
credentials.UserName = "INSERT EMAIL";
credentials.Password = "INSERT PASSWORD";
smtp.Credentials = credentials;

MailAddress addressFrom = new MailAddress(credentials.UserName);
MailAddress addressTo = new MailAddress("INSERT RECIPIENT");
MailMessage msg = new MailMessage(addressFrom, addressTo);
msg.Subject = "SUBJECT"
msg.Body = "BODY";

smtp.Send(msg);

Notice these important prerequisites on your G SUITE account

Ensure that the username you use has cleared the CAPTCHA word verification test that appears when you first sign in.
Ensure that the account has a secure password - https://support.google.com/accounts/answer/32040
Make sure that Less secure apps is enabled for the desired account- https://support.google.com/a/answer/6260879