出于某种原因,既不是接受的答案,也没有其他工作为我“通过Gmail在。net发送电子邮件”。为什么它们不会起作用?

更新:我已经在另一个问题中尝试了所有的答案(接受的和其他的),但没有一个有效。

我只是想知道它是否适用于其他人,否则谷歌可能已经改变了一些东西(以前发生过)。

当我尝试使用SmtpDeliveryMethod的代码段时。网络,我很快收到一个SmtpException发送(消息)。信息是

SMTP服务器需要安全连接,否则客户端未经过身份验证。

服务器的回复是:

5.5.1认证要求在“<——说真的,它到此结束。

更新:

这是我很久以前问过的一个问题,公认的答案是我在不同的项目中使用过很多很多次的代码。

我采用了这篇文章和其他EmailSender项目中的一些想法,在Codeplex上创建了一个EmailSender项目。它是为可测试性而设计的,支持我最喜欢的SMTP服务,如GoDaddy和Gmail。


当前回答

@Andres Pompiglio:是的,你必须至少修改一次密码。 这个代码工作得很好:

//Satrt Send Email Function
public string SendMail(string toList, string from, string ccList,
    string subject, string body)
{

    MailMessage message = new MailMessage();
    SmtpClient smtpClient = new SmtpClient();
    string msg = string.Empty;
    try
    {
        MailAddress fromAddress = new MailAddress(from);
        message.From = fromAddress;
        message.To.Add(toList);
        if (ccList != null && ccList != string.Empty)
            message.CC.Add(ccList);
        message.Subject = subject;
        message.IsBodyHtml = true;
        message.Body = body;
        // We use gmail as our smtp client
        smtpClient.Host = "smtp.gmail.com";   
        smtpClient.Port = 587;
        smtpClient.EnableSsl = true;
        smtpClient.UseDefaultCredentials = true;
        smtpClient.Credentials = new System.Net.NetworkCredential(
            "Your Gmail User Name", "Your Gmail Password");

        smtpClient.Send(message);
        msg = "Successful<BR>";
    }
    catch (Exception ex)
    {
        msg = ex.Message;
    }
    return msg;
}
//End Send Email Function

并且你可以使用以下方法调用函数:

Response.Write(SendMail(recipient Address, "UserName@gmail.com", "ccList if any", "subject", "body"))

其他回答

这段代码适用于我,也允许在gmail访问不安全的应用程序,并在2个步骤中删除身份验证:

Host = "smtp.gmail.com",
Port = 587,
EnableSsl = true,
DeliveryMethod = System.Net.Mail.SmtpDeliveryMethod.Network,
UseDefaultCredentials = false,
Credentials = new NetworkCredential(MailAddress, Password)

谷歌不再允许“不太安全的应用程序”,所以这对普通Gmail用户来说是不可能的。

2022年5月后谷歌更改。

对于这些更改,我们必须对代码进行以下更改。

First go to Gmail account security. Enable two-factor authentication. Configure the App password in the google account. Use the App password in the application. MailMessage mail = new MailMessage(); mail.To.Add(email.Text.ToString().Trim()); mail.From = new MailAddress("your_Gmail_address"); mail.Subject = "Hello test email"; mail.Body = "<p>hello user<br/> How are you?</p>"; mail.IsBodyHtml = true; SmtpClient smtp = new SmtpClient(); smtp.Port = 587; // 25 465 smtp.EnableSsl = true; smtp.UseDefaultCredentials = false; smtp.Host = "smtp.gmail.com"; smtp.Credentials = new System.Net.NetworkCredential("your_Gmail_address", "Your_gmail_app_password"); smtp.Send(mail);

这些错误有一个或多个原因。

Log in with your Gmail( or any other if ) in your local system. Also check for Less Secure App and Set it to "Turn On" here is the Link for GMAIL. https://www.google.com/settings/security/lesssecureapps check for EnableSsl in your Email code, and also set it to true. smtp.EnableSsl = true; Also check which port are you using currently. 25 is Global, but you can check it for others too like 587. check here. Does all SMTP communication happen over 25? IF YOU ARE ON REMOTE : Check the answer of Vlad Tamas above.

@Andres Pompiglio:是的,你必须至少修改一次密码。 这个代码工作得很好:

//Satrt Send Email Function
public string SendMail(string toList, string from, string ccList,
    string subject, string body)
{

    MailMessage message = new MailMessage();
    SmtpClient smtpClient = new SmtpClient();
    string msg = string.Empty;
    try
    {
        MailAddress fromAddress = new MailAddress(from);
        message.From = fromAddress;
        message.To.Add(toList);
        if (ccList != null && ccList != string.Empty)
            message.CC.Add(ccList);
        message.Subject = subject;
        message.IsBodyHtml = true;
        message.Body = body;
        // We use gmail as our smtp client
        smtpClient.Host = "smtp.gmail.com";   
        smtpClient.Port = 587;
        smtpClient.EnableSsl = true;
        smtpClient.UseDefaultCredentials = true;
        smtpClient.Credentials = new System.Net.NetworkCredential(
            "Your Gmail User Name", "Your Gmail Password");

        smtpClient.Send(message);
        msg = "Successful<BR>";
    }
    catch (Exception ex)
    {
        msg = ex.Message;
    }
    return msg;
}
//End Send Email Function

并且你可以使用以下方法调用函数:

Response.Write(SendMail(recipient Address, "UserName@gmail.com", "ccList if any", "subject", "body"))

为您的帐户打开不太安全的应用程序:https://www.google.com/settings/security/lesssecureapps