c# - 如何配置 smtp 设置？

Question

我想在 asp.net 中使用 PasswordRecovery 控件恢复密码。但是当我单击提交按钮时。我收到了这样的消息:

错误的命令序列。服务器响应是:此邮件服务器在尝试发送到非本地电子邮件地址时需要身份验证。请检查您的邮件客户端设置或联系您的管理员以验证是否为此服务器定义了域或地址.这是我的 html 代码:

<asp:PasswordRecovery ID="PasswordRecovery1" runat="server" 
          style="font-family: Tahoma; font-size: small" 
          onsendingmail="PasswordRecovery1_SendingMail" >
          <MailDefinition BodyFileName="../User Pages/RecoveryPass.htm" From="info@shirinfam.com"
            IsBodyHtml="True" Subject="بازیابی کلمه ی عبور" Priority="High"></MailDefinition>
        <UserNameTemplate>
            <table cellpadding="1" cellspacing="0" style="border-collapse:collapse;">
                <tr>
                    <td>
                        <table cellpadding="0">
                            <tr>
                                <td align="center" colspan="2">
                                    &nbsp;</td>
                            </tr>
                            <tr>
                                <td align="center" colspan="2">
                                    <asp:Label ID="Label1" runat="server" 
                                        Text="<%$ Resources:resource, passrecovery %>" 
                                        style="font-size: small; font-family: Tahoma"></asp:Label></td>
                            </tr>
                            <tr>
                                <td align="right">
                                    <asp:Label ID="UserNameLabel" runat="server" AssociatedControlID="UserName"></asp:Label>
                                </td>
                                <td>
                                    <asp:TextBox ID="UserName" runat="server"></asp:TextBox>
                                    <asp:RequiredFieldValidator ID="UserNameRequired" runat="server" 
                                        ControlToValidate="UserName" ErrorMessage="User Name is required." 
                                        ToolTip="User Name is required." ValidationGroup="PasswordRecovery1">*</asp:RequiredFieldValidator>
                                </td>
                            </tr>
                            <tr>
                                <td align="center" colspan="2" style="color:Red;">
                                    <asp:Literal ID="FailureText" runat="server" EnableViewState="False"></asp:Literal>
                                </td>
                            </tr>
                            <tr>
                                <td align="right" colspan="2">
                                    <asp:Button ID="SubmitButton" runat="server" CommandName="Submit" Text="<%$ Resources:resource, submit %>" 
                                        ValidationGroup="PasswordRecovery1" Font-Names="tahoma" 
                                        Font-Size="X-Small" Width="80px" />
                                </td>
                            </tr>
                        </table>
                    </td>
                </tr>
            </table>
        </UserNameTemplate>
</asp:PasswordRecovery>

这是背后的代码:

protected void PasswordRecovery1_SendingMail(object sender, MailMessageEventArgs e)
    {
        SmtpClient smtp = new SmtpClient();

        smtp.Send(e.Message);
    }

这是 web.config 中的 smtp 设置:

 <system.net>
    <mailSettings >
      <smtp >
        <network host="mail.domainname.com" userName="info@dominname.com" password ="password" defaultCredentials="false"/>
      </smtp>
          </mailSettings>
  </system.net>

Answer 1

为您的电子邮件帐户设置您的凭据，假设您正在使用您的Gmail帐户发送电子邮件，那么，您必须设置凭据(用户名和密码) 到您的 smtpClient 对象。

示例如下:

 MailMessage m = new MailMessage();
 SmtpClient sc = new SmtpClient();

MailMessage 帮助我们创建邮件，而 SmtpClient 允许我们向收件人发送邮件。

注意:以下代码配置为从 GMAIL 帐户发送邮件..

m.From = new MailAddress("from@gmail.com", "Display name");
m.To.Add(new MailAddress("to@domain.com", "Display name To"));
m.Subject = "Test";
m.Body = "This is a Test Mail";
sc.Host = "smtp.gmail.com";
sc.Port = 587;
sc.Credentials = new System.Net.NetworkCredential("from@gmail.com", "password of from");
sc.EnableSsl = true; // runtime encrypt the SMTP communications using SSL
sc.Send(m);