如何在发送邮件之前验证vb.net中的smtp凭据 [英] how to validate smtp credentials in vb.net before sending a mail

问题描述

这是我的代码：

This is my code:

using System.Net;
using System.Net.Mail;

// Before this code i need validate smtp credentials

SmtpClient smtpClient = new SmtpClient();
NetworkCredential basicCredential = 
    new NetworkCredential("username", "password"); 
MailMessage message = new MailMessage(); 
MailAddress fromAddress = new MailAddress("[e-mail]"); 

smtpClient.Host = "mail.mydomain.com";
smtpClient.UseDefaultCredentials = false;
smtpClient.Credentials = basicCredential;

message.From = fromAddress;
message.Subject = "your subject";
//Set IsBodyHtml to true means you can send HTML email.
message.IsBodyHtml = true;
message.Body = "<h1>your message body</h1>";
message.To.Add("[e-mail]"); 

try
{
    smtpClient.Send(message);
}
catch(Exception ex)
{
    //Error, could not send the message
    Response.Write(ex.Message);
}

推荐答案

SO：我可以在调用client.Send（）之前测试SmtpClient吗？ [ ^ ]可以给你一些线索。

SO: Can I test SmtpClient before calling client.Send()?[^] could give you some clues.

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