向本地域发送电子邮件

问题描述

我有一个从网站发送电子邮件的简单方法:

I've got a simple method to send emails from the website:

... // local vars
using (var mail = new MailMessage(from, sendTo))
{
    using (var smtp = new SmtpClient())
    {
        mail.CC.Add(cc);
        mail.Bcc.Add(bcc.Replace(";", ","));
        mail.Subject = subject;
        mail.Body = body;
        mail.IsBodyHtml = html == -1;
        mail.Priority = priority;
        mail.BodyEncoding = mail.SubjectEncoding = mail.HeadersEncoding = Encoding.UTF8;                    

        smtp.DeliveryMethod = SmtpDeliveryMethod.PickupDirectoryFromIis;

        try
        {
            if (mail.Body.IsNotEmpty())
            {               
                smtp.Send(mail);                
            }
        }
        catch
        {
            smtp.DeliveryMethod = SmtpDeliveryMethod.Network;

            try
            {
                if (mail.Body.IsNotEmpty())
                {                   
                    smtp.Send(mail);                    
                }
            }
            catch(Exception e)
            {               
                // I log the error here
            }
        }
    }
}

效果很好；但是，当发件人是 anything@domainname.com 而收件人是 bob@domainname.com 时，电子邮件会卡在 Drop 中inetpub/mailroot 目录的文件夹，并且从未发送给收件人.

Which works great; however, when the sender is anything@domainname.com and the recipient is bob@domainname.com, the emails are getting stuck in the Drop folder of the inetpub/mailroot directory and never sent to the recipient.

问题是 - 我怎样才能解决这个问题，以便能够向同一(本地)域中的人发送电子邮件?

The question is - how I can get around this to be able to send emails to people on the same (local) domain?

推荐答案

我认为几乎可以肯定是邮件服务器配置问题.

I think it is almost certainly a mail server configuration issue.

根据 SmptClient.Send()文档 任何不正确的配置(主机、凭据、端口、SSL、防火墙、防病毒等)都应该抛出 InvalidOperationException 或 SmtpException.

According to the SmptClient.Send() Documentation any incorrect configuration on your end (Host, Credentials, Port, SSL, Firewall, Anti-Virus etc) should throw an InvalidOperationException or a SmtpException.

您可以使用相同的代码和配置发送外部邮件这一事实 - 这意味着您可以连接到邮件服务器，这也非常强烈地表明问题出在下游.

The fact that you can send external mail using the same code and config - which means that you have connectivity to the mail server also very strongly suggests that the problem lies downstream.

我过去曾在有不同邮件服务器用于内部和外部邮件传递的公司工作.

I have worked at companies in the past that had different mail servers for internal and external mail delivery.

可能值得考虑消息使用的凭据.也许您有一个规则，它只允许一个组(所有公司或类似的东西)的成员向内部地址发送邮件.您可以通过使用您的真实域凭据来检查这一点(并在测试后将其删除)

It could be worth considering what Credentials are being used for the message. Perhaps you have a rule which only allows members of a group (All Company or something like that) to send mail to internals addresses. You could check this by using your real domain credentials (and removing them after the test)

smtp.Credentials = new NetworkCredential("your.username", "your.password");

无论哪种方式，如果没有产生异常，邮件应该已经在邮件服务器上接收到，并且由该服务器来决定传递.

Either way if no exception is generated the message should have been received on the mail server, and it is up to that server to determine delivery.

这篇关于向本地域发送电子邮件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持跟版网！