SmtpException 类

最新推荐文章于 2024-02-12 20:57:53 发布

转载最新推荐文章于 2024-02-12 20:57:53 发布 · 344 阅读

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原文链接：http://www.cnblogs.com/Athrun/archive/2006/11/07/552556.html

本文介绍如何使用C#的SmtpClient类发送电子邮件，并实现当遇到邮箱繁忙或不可用时的重试机制。通过具体的代码示例，展示了如何配置邮件地址、主题、正文等内容，并处理可能出现的异常。

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http://msdn2.microsoft.com/zh-cn/library/system.net.mail.smtpexception(VS.80).aspx

public static void RetryIfBusy( string server)
{
    MailAddress from = new MailAddress( " ben@contoso.com " );
    MailAddress to = new MailAddress( " jane@contoso.com " );
    MailMessage message = new MailMessage(from, to);
     // message.Subject = "Using the SmtpClient class.";
    message.Subject = " Using the SmtpClient class. " ;
    message.Body = @" Using this feature, you can send an e-mail message from an application very easily. " ;
     // Add a carbon copy recipient.
    MailAddress copy = new MailAddress( " Notifications@contoso.com " );
    message.CC.Add(copy);
    SmtpClient client = new SmtpClient(server);
     // Include credentials if the server requires them.
    client.Credentials = (ICredentialsByHost)CredentialCache.DefaultNetworkCredentials;
    Console.WriteLine( " Sending an e-mail message to {0} using the SMTP host {1}. " ,
         to.Address, client.Host);
     try
    {
        client.Send(message);
    }
     catch (SmtpFailedRecipientsException ex)
    {
         for ( int i = 0 ; i < ex.InnerExceptions.Length; i ++ )
        {
            SmtpStatusCode status = ex.InnerExceptions[i].StatusCode;
             if (status == SmtpStatusCode.MailboxBusy ||
                status == SmtpStatusCode.MailboxUnavailable)
            {
                Console.WriteLine( " Delivery failed - retrying in 5 seconds. " );
                System.Threading.Thread.Sleep( 5000 );
                client.Send(message);
            }
             else
            {
                Console.WriteLine( " Failed to deliver message to {0} " , ex.FailedRecipient[i]);
            }
        }
    }
}

转载于:https://www.cnblogs.com/Athrun/archive/2006/11/07/552556.html