通过C＃通过Google Apps帐户发送电子邮件 _Google

幼敏悟过人，读书辄成诵。这篇文章主要讲述通过C＃通过Google Apps帐户发送电子邮件相关的知识，希望能为你提供帮助。
我有一个标准的Google Apps帐户。我已通过Google Apps设置了自定义域名。当我使用Gmail界面时，我可以通过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("someone@somewhere.com"); 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 = "emailAddress@mydomain.com"; 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);

到达Send方法时，抛出异常，指出：

“SMTP服务器需要安全连接或客户端未经过身份验证。服务器响应为：5.5.1需要身份验证。”

如何通过Google通过自定义域发送电子邮件？
【通过C＃通过Google Apps帐户发送电子邮件】谢谢！
答案无需对代码中的所有smtp设置进行硬编码。把它们放在web.config中。这样，您可以根据需要加密这些设置，并在不重新编译应用程序的情况下即时更改它们。

< configuration> < system.net> < mailSettings> < smtp from="example@domain.com" deliveryMethod="Network"> < network host="smtp.gmail.com" port="587" userName="example@domain.com" 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("navin@php.net"); // here is an important part: message.From = new MailAddress("example@domain.com", "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);

确保您从与Gmail尝试进行身份验证的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，而不是在代码中设置它。
另一答案这就是我在WPF 4中使用的内容

SmtpClient client = new SmtpClient(); client.Credentials = new NetworkCredential("sender_email@domain.tld", "P@$$w0rD"); client.Port = 587; client.Host = "smtp.gmail.com"; client.EnableSsl = true; try { MailAddress maFrom = new MailAddress("sender_email@domain.tld", "Sender's Name", Encoding.UTF8), maTo = new MailAddress("recipient_email@domain2.tld", "Recipient's Name", Encoding.UTF8); MailMessage mmsg = new MailMessage(maFrom.Address, maTo.Address); 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; }

注意防火墙和反病毒。这些令人毛骨悚然的东西往往会阻止发送电子邮我使用McAfee Enterprise，我必须添加可执行文件名（如Bazar.exe和Bazar.vshost.exe的Bazar。*）才能发送电子邮件...
另一答案将端口更改为465
另一答案没有必要做任何事情。只需首次登录您当前的帐户并按照说明操作即可。
你的问题会解决。之所以出现这种情况，是因为您在Google应用中创建了该帐户但未登录。只需登录并按照说明进行操作即可。
另一答案我的代码在Port = 587上使用TLS连接到smtp.google.com（SSL应该是端口465），但仍然需要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帐户中的这些重要先决条件