blocks|key|3178996|text|我不能直接回答关于对data-uri的支持的问题，但是在电子邮件浏览器中对这种东西的支持通常是非常糟糕的。这个问题确实存在于他们中的许多人，他们使用的是自己的精简渲染引擎，而这些引擎并不是完整的html渲染器。在一个系统中，最好还是使用基于表格的设计，以确保电子邮件的可读性，我不会尝试做任何聪明的事情。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3178997|但是，您可能已经知道电子邮件允许两种类型的附件。如果您将一个附件标记为内联，那么它往往不会显示在附件列表中(尽管它经常会出现)。|3178998|我个人认为，确保电子邮件的可读性比不显示要好，显然，远程图像的另一种方法在这里没有帮助。|3178999|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

I can't answer the question about the support for data-uri directly but support for anything like this is often very bad in email browsers. The issue really spans from many of them using their own cut down rendering engines that aren't full html renderers. In a system that it's still preferable to use a table based design to make sure emails are readable I wouldn't try to do anything clever.

However, you may already know that email allows two types of attachment. If you mark an attachment as inline then it tends not to show up in the list of attachments (though it often does).

I would think personally that ensuring the readability of the email is better than it not showing up and obviously the other approach of remote images doesn't help here.

blocks|key|3179036|text|Mac+Mail、Outlook2003和MobileMe支持数据URI。不确定其他客户端，但您可以很容易地找到-在Gmail中创建一条新消息，单击“插入图像”，然后单击“使用URL”并粘贴数据URI。然后，将其发送到多个地址，并在您想要的客户端中打开它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3179037|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Mac Mail, Outlook 2003 and MobileMe support data URIs. Not sure about the other clients, but you can easily find out — create a new message in Gmail, click 'insert image', then click 'use a URL' and paste in the data URI. Then, send it to a number of addresses and open it in the clients you want.

blocks|key|3179079|text|我刚刚测试了GMail，GMail似乎不再支持数据URI。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3179080|此外，gmx.de+(一家非常流行的德国web邮件提供商)在其服务器上将图像URI转换为URI，而这似乎不支持数据URI。|3179081|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I just tested GMail, and it appears that GMail no longer supports data URIs.

In addition, gmx.de (a very popular German web mail provider) converts image URIs to a URI on its server, and this doesn't seem to support data URIs.

blocks|key|265951|text|我在Litmus做了一个最近的测试，使用内联<img>元素和css背景图像的数据URI。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|265952|这些桌面客户端确实会显示数据URI：|265953|265954|苹果邮件5|unordered-list-item|265955|苹果邮件6|265956|Lotus+Notes+8|265957|Outlook+|265958|最新版本|265959|这些移动客户端确实会显示数据URI：|265960|265961|Android+2.3|265962|Android+4.0|265963|BlackBerry+5+OS|265964|iPad|265965|iPhone+3GS|265966|iPhone+4S|265967|iPhone+5|265968|265969|所有webmail客户端均未显示数据URI。|265970|这些桌面客户端不：|265971|265972|Lotus+Notes+6.5|265973|Lotus+Notes+7|265974|Lotus+Notes+8.5|265975|Outlook2000|265976|<代码>H141Outlook+2002/XP|265977|Outlook+2007<代码>H244<代码>H145Outlook+2010<代码>H246<代码>H147Outlook+2011<代码>H248<代码>H149Outlook+2013<代码>H250<代码>F251|265978|265979|这些移动客户端没有：|265980|265981|Gmail+(Android)|265982|Outlook.com+(Android)|265983|Yahoo+(Android)|265984|BlackBerry+4+OS|265985|Symbian|265986|Windows+Phone+7.5|265987|265988|entityMap|0|LINK|mutability|MUTABLE|url|http://litmus.com/^0|M|5|2|6|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|2H|8|@$9|2I|A|2J|B|C]]|D|@$9|2K|A|2L|1|2M]]|E|$]]|$1|F|3|G|5|6|7|2N|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|2O|8|@]|D|@]|E|$]]|$1|I|3|J|5|K|7|2P|8|@]|D|@]|E|$]]|$1|L|3|M|5|K|7|2Q|8|@]|D|@]|E|$]]|$1|N|3|O|5|K|7|2R|8|@]|D|@]|E|$]]|$1|P|3|Q|5|K|7|2S|8|@]|D|@]|E|$]]|$1|R|3|S|5|6|7|2T|8|@]|D|@]|E|$]]|$1|T|3|U|5|6|7|2U|8|@]|D|@]|E|$]]|$1|V|3|-4|5|6|7|2V|8|@]|D|@]|E|$]]|$1|W|3|X|5|K|7|2W|8|@]|D|@]|E|$]]|$1|Y|3|Z|5|K|7|2X|8|@]|D|@]|E|$]]|$1|10|3|11|5|K|7|2Y|8|@]|D|@]|E|$]]|$1|12|3|13|5|K|7|2Z|8|@]|D|@]|E|$]]|$1|14|3|15|5|K|7|30|8|@]|D|@]|E|$]]|$1|16|3|17|5|K|7|31|8|@]|D|@]|E|$]]|$1|18|3|19|5|K|7|32|8|@]|D|@]|E|$]]|$1|1A|3|-4|5|6|7|33|8|@]|D|@]|E|$]]|$1|1B|3|1C|5|6|7|34|8|@]|D|@]|E|$]]|$1|1D|3|1E|5|6|7|35|8|@]|D|@]|E|$]]|$1|1F|3|-4|5|6|7|36|8|@]|D|@]|E|$]]|$1|1G|3|1H|5|K|7|37|8|@]|D|@]|E|$]]|$1|1I|3|1J|5|K|7|38|8|@]|D|@]|E|$]]|$1|1K|3|1L|5|K|7|39|8|@]|D|@]|E|$]]|$1|1M|3|1N|5|K|7|3A|8|@]|D|@]|E|$]]|$1|1O|3|1P|5|6|7|3B|8|@]|D|@]|E|$]]|$1|1Q|3|1R|5|K|7|3C|8|@]|D|@]|E|$]]|$1|1S|3|-4|5|6|7|3D|8|@]|D|@]|E|$]]|$1|1T|3|1U|5|6|7|3E|8|@]|D|@]|E|$]]|$1|1V|3|-4|5|6|7|3F|8|@]|D|@]|E|$]]|$1|1W|3|1X|5|K|7|3G|8|@]|D|@]|E|$]]|$1|1Y|3|1Z|5|K|7|3H|8|@]|D|@]|E|$]]|$1|20|3|21|5|K|7|3I|8|@]|D|@]|E|$]]|$1|22|3|23|5|K|7|3J|8|@]|D|@]|E|$]]|$1|24|3|25|5|K|7|3K|8|@]|D|@]|E|$]]|$1|26|3|27|5|K|7|3L|8|@]|D|@]|E|$]]|$1|28|3|-4|5|6|7|3M|8|@]|D|@]|E|$]]|$1|29|3|-4|5|6|7|3N|8|@]|D|@]|E|$]]]|2A|$2B|$5|2C|2D|2E|E|$2F|2G]]]]

I've done a more recent test at <a href="http://litmus.com/" rel="noreferrer">Litmus</a>, with data URIs for inline <code>&lt;img&gt;</code> elements and css background images.

These desktop clients do show data URIs:

<ul>
<li>Apple Mail 5</li>
<li>Apple Mail 6</li>
<li>Lotus Notes 8</li>
<li>Outlook 2003</li>
<li>Thunderbird 3.0</li>
<li>Thunderbird latest</li>
</ul>

These mobile clients do show data URIs:

<ul>
<li>Android 2.3</li>
<li>Android 4.0</li>
<li>BlackBerry 5 OS</li>
<li>iPad</li>
<li>iPhone 3GS</li>
<li>iPhone 4S</li>
<li>iPhone 5</li>
</ul>

None of the webmail clients showed data URIs.

These desktop clients don't:

<ul>
<li>Lotus Notes 6.5</li>
<li>Lotus Notes 7</li>
<li>Lotus Notes 8.5</li>
<li>Outlook 2000</li>
<li>Outlook 2002/XP</li>
<li>Outlook 2007</li>
<li>Outlook 2010</li>
<li>Outlook 2011</li>
<li>Outlook 2013</li>
</ul>

These mobile clients don't:

<ul>
<li>Gmail (Android)</li>
<li>Outlook.com (Android)</li>
<li>Yahoo (Android)</li>
<li>BlackBerry 4 OS</li>
<li>Symbian</li>
<li>Windows Phone 7.5</li>
</ul>

<a href="http://en.wikipedia.org/wiki/Data_URI_scheme" rel="noreferrer">Data URIs</a> are a standard way to embed images and other binary data in HTML, and browser support is well documented on the web. (IE8 was the first version of IE to support Data URI, with a max 32 KB size per URI; other major browsers have supported it even longer.)

My question is about desktop email and webmail client software.

When building HTML email, standard practice is either to include images as attachments or load them externally (i.e. tracking images). Both of these have disadvantages (some clients list all of these attached files, while many rightly block or require user action to see external images). So, Data URI looks like a good way to go, but only if it's supported by email readers.

So, does anyone have a link to a recent study of support for this feature? Or investigated this at all? For example, here's an <a href="http://www.campaignmonitor.com/css/" rel="noreferrer">overview of CSS support</a>. Client software I'd be interested includes: 

Desktop (including version info): Outlook, Apple Mail, Thunderbird, Evolution, Lotus Notes, AOL, Eudora

Webmail: Gmail, Live/Hotmail, Yahoo! Mail, AOL

Mobile: Android, iPhone

What is Data URI support like in major email client software?

服务器

Android

是在超文本标记语言中嵌入图像和其他二进制数据的标准方法，浏览器支持在web上有很好的文档记录。(IE8是第一个支持数据URI的IE版本，每个URI的最大大小为32KB；其他主要浏览器甚至支持得更久。)我的问题是关于桌面电子邮件和webmail客户端软件。在构建HTML电子邮件时，标准做法是要么将图像作为附件包含，要么从...

问主要电子邮件客户端软件对数据URI的支持情况如何？
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