如何配置smtp设置？

Question

我想在asp.net中使用PasswordRecovery控件恢复密码，但是当我点击提交按钮。我得到这样的消息：

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进行身份验证。请检查您的邮件客户端设置，或与您的管理员联系，以验证为此服务器 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> 

，这是后面的代码：

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

     smtp.Send(e.Message); 
    } 

，这是在web.config中 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

的DefaultCredentials应设置为true，并且应该明确地将凭据添加到客户端。

SmtpClient client = new SmtpClient(server, port); 
     // Credentials are necessary if the server requires the client 
     // to authenticate before it will send e-mail on the client's behalf. 
     client.Credentials = CredentialCache.DefaultNetworkCredentials; 

Answer 2

设置您的电子邮件帐户credentials，假设您正在使用您的帐户Gmail发送电子邮件，所以，你必须设置credentials (username and password)您smtpClient object。

以下是例子::

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

MAILMESSAGE

帮助我们创建邮件和SmtpClient使我们能够将邮件发送到reciepient。

注意：下面的代码被配置为从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);