你能做的最重要的事情是确保你要发送电子邮件的人在收到你的电子邮件时不太可能点击“垃圾邮件”按钮。所以，请遵循以下经验法则:

Make sure you have permission from the people you are sending email to. Don't ever send email to someone who did not request it from you. Clearly identify who you are right at the top of each message, and why the person is receiving the email. At least once a month, send out a reminder email to people on your list (if you are running a list), forcing them to opt back in to the list in order to keep receiving communications from you. Yes, this will mean your list gets shorter over time, but the up-side is that the people on your list are "bought in" and will be less likely to flag your email. Keep your content highly relevant and useful. Give people an easy way to opt out of further communications. Use an email sending service like SendGrid that works hard to maintain a good IP reputation. Avoid using short links - these are often blacklisted.

遵循这些经验法则将大有裨益。

在尽可能多的主要电子邮件提供商(gmail/yahoo/hotmail/aol/etc)上注册一个帐户。如果你改变了你的电子邮件，无论是重大的措辞，改变了发送电子邮件的代码，改变了你的电子邮件服务器，等等，一定要向你所有的账户发送测试邮件，并验证它们没有被标记为垃圾邮件。

在过去的工作中，我在很多网站上都遇到过同样的问题。确保用户收到邮件的唯一保证方法是建议用户将你添加到安全列表中。其他任何方法都只能帮助解决这个问题，而且不能保证。

除了所有其他答案外，如果您发送的HTML电子邮件包含URL作为链接文本，请确保URL与链接文本匹配。我知道雷鸟会自动将他们标记为骗局。

错误的方式:

Go to your account now: <a href="http://www.paypal.com.phishers-anonymous.org/">http://www.paypal.com</a>

正确的做法:

Go to your account now: <a href="http://www.yourdomain.org/">http://www.yourdomain.org</a>

或者使用不相关的链接文本代替URL:

<a href="http://www.yourdomain.org/">Click here to go to your account</a>

你能做的最重要的事情是确保你要发送电子邮件的人在收到你的电子邮件时不太可能点击“垃圾邮件”按钮。所以，请遵循以下经验法则:

Make sure you have permission from the people you are sending email to. Don't ever send email to someone who did not request it from you. Clearly identify who you are right at the top of each message, and why the person is receiving the email. At least once a month, send out a reminder email to people on your list (if you are running a list), forcing them to opt back in to the list in order to keep receiving communications from you. Yes, this will mean your list gets shorter over time, but the up-side is that the people on your list are "bought in" and will be less likely to flag your email. Keep your content highly relevant and useful. Give people an easy way to opt out of further communications. Use an email sending service like SendGrid that works hard to maintain a good IP reputation. Avoid using short links - these are often blacklisted.

遵循这些经验法则将大有裨益。

我的一个应用程序的电子邮件经常被标记为垃圾邮件。它是带有单个链接的HTML，我在正文中用text/ HTML内容类型将其作为HTML发送。

我对这个问题最成功的解决方法是编写电子邮件，让它看起来像是由电子邮件客户端生成的。

我将电子邮件更改为多部分/替代mime文档，现在我生成文本/纯文本和文本/html部分。

电子邮件不再被outlook检测为垃圾。