什么是下载价格低于 25 美元的优质 SMTP 服务器？
我正在寻找一个 SMTP 服务器，我们可以使用它来发送大量邮件（每小时 1,000 封以上）而不会被阻止。它可以在我们的机器上下载或在线运行，但价格不能超过 25 美元。难道就没有一个好的开源解决方案吗？我还没找到。谢谢。
I am looking for a SMTP server that we can use for outgoing mail that permits a high volume (1,000+ per hour) without getting blocked. It could be downloaded on our machine or run online, but cannot cost over $25. Isn't there a good open source solution? I haven't been able to find one yet. Thanks.
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嗯，甚至还有可以发送大量电子邮件的免费 SMTP 服务器。
问题不在于发送，而是交付。您会看到，SMTP 是一种尽力而为的存储转发协议 - 电子邮件从一个 SMTP 服务器传递到另一个服务器，希望它能够更接近收件人的邮件服务器（通常它可以工作）。然而，这也意味着您的消息可能会被该服务器链中的任何位置或收件人拒绝或丢弃。一旦电子邮件离开您的网络，您就无能为力。换句话说，阻止电子邮件的不是您的服务器，而是它将邮件传递到的服务器。
这个问题可能对您的问题有帮助；另请参阅 本文提供了一些有助于您的电子邮件送达的提示。
Well, there are even free SMTP servers that can send a high volume of e-mail.
The problem is not in sending them, the problem is in delivering. You see, SMTP is a best-effort store-and-forward protocol - the e-mails are passed from one SMTP server to another in hope that it gets closer to the adressee's mail server (and usually it works). However, this also means that your message can be rejected or dropped anywhere in this chain of servers - or by the recipient. Once the e-mail leaves your network, there's not much you can do about it. In other words, it's not your server blocking the e-mails, but the servers it will be passing the mails to.
This question may be a useful reference for your problem; see also this article for some tips that will help your e-mail get delivered.
对于这么多的电子邮件，可能任何服务器都可以很好地处理。问题是不要被列为垃圾邮件发送者黑名单。杰夫·阿特伍德有一个很好的 关于该主题的博客文章。
我个人会推荐 Postfix 或 qmail，但这只是我......
For that ammount of email, probably any server will do just fine. The problem is not to be blacklisted as a spammer. Jeff Atwood has a good blog post on the subject.
I personnaly would recommend Postfix or qmail, but that just me ...