问题描述
这个问题类似于，除了邮件客户端。例如，如果在内置的iPhone邮件客户端上打开电子邮件，它将显示专门为iPhone格式化的邮件的版本。如果在平板电脑或桌面上打开，它将显示为完整的全尺寸版本的电子邮件。这在原理上类似于通过检测用户代理（而不是电子邮件客户端）自动加载的具有移动友好版本的网站的网站。
This question is similar to "Standard way to detect mobile browsers in a web application based on the http request" except for mail clients. For instance, if an email message is opened on the built-in iPhone mail client it will display a version of the message specially formatted for the iPhone. If opened on an tablet or desktop it will display as the complete, full-size version of the email. This is similar in principle to web sites that have mobile-friendly versions of the site that load automatically by detecting the user-agent - but for email clients.
所以 - 是可以检测用于打开电子邮件的邮件客户端并相应地格式化邮件？也许是一种检测屏幕分辨率的方法？
So - is it possible to detect the mail client being used to open an email and format the message accordingly? Perhaps a way to detect the screen resolution?
推荐答案
您可以尝试应用 @media css查询针对特定的浏览器，如移动设备。 有一个很好的介绍，但请注意，它可能是只支持在一个充满了浏览器和设备的手中，iOS在他们身上幸运：）
You can try to apply @media css queries that target specific browsers like mobile devices. There is a good introduction on the campaignmonitor help website but be aware, it probably is only supported in a hand full of browsers and devices, iOS being on of them luckily :)
基本上，您正在定义针对特定屏幕宽度的CSS样式，以便您可以优化您的电子邮件的屏幕空间有限。
Basically you are defining css styles that target specific screen widths so that you can optimize your email for limited screen space.
@media only screen and (max-device-width: 480px) { ... }
当谈到真正的检测和显示完全不同的电子邮件时，这是真的不可能，因为你在谈论javascript这不是在电子邮件中完成的，甚至在所有电子邮件客户端的99％中甚至不会工作。但是，您可以使用@media查询方式走下去。
When talking really detection and displaying a totally different email, that's really impossible since you are talking about javascript there and that's not done in emails and probably won't even work in 99% of all email clients. But you can go a loooong way with @media queries.
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