C# SMTP服务器需要安全连接，或者客户端未通过身份验证。

我正在asp中使用“createuserwizard”创建表单。这是我的代码

<asp:CreateUserWizard ID="userwizard" ContinueDestinationPageUrl="~/secretfiles/secret.aspx" runat="server" >
    <MailDefinition BodyFileName="register.txt" Subject="Registration Confirmation" From="amrit.enest@gmail.com" />
    </asp:CreateUserWizard>

现在，当一个新用户单击submit按钮时，它会给出以下错误消息，邮件不会被发送

SMTP服务器需要安全连接，或者客户端未通过身份验证。服务器响应为：5.7.0必须首先发出STARTTLS命令。ud8sm21095949igb.4

请帮助大家。

使用

启用ssl=“true”

，如下所示：

 <mailSettings>
  <smtp deliveryMethod="Network" from="amrit.enest@gmail.com">
    <network enableSsl="true" host="smtp.gmail.com" port="25" userName="amrit.enest@gmail.com" password="sending emails's password" />
  </smtp>
</mailSettings>

---

服务器需要SSL，因此您需要将其添加到配置中：

<mailSettings>
  <smtp deliveryMethod="Network" from="amrit.enest@gmail.com">
    <network host="smtp.gmail.com" port="25" userName="amrit.enest@gmail.com" 
        password="sending emails's password" enableSsl="true" />
  </smtp>
</mailSettings>

有关详细信息，请参阅

protected void Button1_Click(object sender, EventArgs e)
{

    MailMessage mail = new MailMessage();
    MailAddress from = new MailAddress("your mail address@mail.com");
    SmtpClient clientobj = new SmtpClient("smtp.gmail.com");
    mail.From = from;
    mail.To.Add(new MailAddress(" to mail address@gmail.com"));
    mail.Subject = "example gridview";
    mail.Body+="Please check below data <br/><br/>";
    mail.Body += getgridviewdata(gv1);
    mail.IsBodyHtml = true;
    clientobj.Credentials = new System.Net.NetworkCredential("your mailaddress@gmail.com", "your email password");
    clientobj.Port =587;
    clientobj.EnableSsl = true;
  clientobj.Send(mail);


}

您还可以在源代码中编写以下内容

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="example.aspx.cs" Inherits="example" EnableEventValidation="false" %>

要么您的密码不正确，要么您可以，我不知道-使用安全smtp端口465谢谢。现在可以使用了。现在请帮助理解这段代码。我假设它在以下流程中工作。localhost请求smtp.gmail.com（服务器）发送电子邮件（用户名、密码），接收电子邮件地址，将邮件发送到目的地。我说的对吗？请让我知道这是我的电脑或smtp.gmail.com的端口号？再次感谢。下次请注意正确的代码格式：单击问号，然后单击高级格式设置以了解操作方法：-）

protected void Button1_Click(object sender, EventArgs e)
{

    MailMessage mail = new MailMessage();
    MailAddress from = new MailAddress("your mail address@mail.com");
    SmtpClient clientobj = new SmtpClient("smtp.gmail.com");
    mail.From = from;
    mail.To.Add(new MailAddress(" to mail address@gmail.com"));
    mail.Subject = "example gridview";
    mail.Body+="Please check below data <br/><br/>";
    mail.Body += getgridviewdata(gv1);
    mail.IsBodyHtml = true;
    clientobj.Credentials = new System.Net.NetworkCredential("your mailaddress@gmail.com", "your email password");
    clientobj.Port =587;
    clientobj.EnableSsl = true;
  clientobj.Send(mail);


}

public string getgridviewdata(GridView gv)
{
    StringBuilder strBuilder = new StringBuilder();
    StringWriter strWriter = new StringWriter(strBuilder);
    HtmlTextWriter htw = new HtmlTextWriter(strWriter);
    gv.RenderControl(htw);
    return strBuilder.ToString();
}
public override void VerifyRenderingInServerForm(Control control)
{
    /* Verifies that the control is rendered */
}

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="example.aspx.cs" Inherits="example" EnableEventValidation="false" %>