我在这里完全不知所措。我想为 html 电子邮件在一个居中的表格中嵌套多个表格，并且萤火虫和 W3C 验证器都告诉我，我的打开表格标签比关闭表格标签多。 firebug 中的测试显示包含表和嵌套表之前一样，而不是围绕它们。
如果我将包含的 <table> 更改为 <div>，所有问题都会消失。不知道出了什么问题。
这是有问题的 html 电子邮件：http://coastmusic.com/optiweb/
【问题讨论】：
标签： html nested html-email css-tables
你目前有这个容器表：
<table width="600" cellpadding="0" cellspacing="0" align="center">
<table width="600" cellpadding="0" cellspacing="0" align="center">
您需要在容器表之后添加tr 和td 标签
<table width="600" cellpadding="0" cellspacing="0" align="center">
<tr>
<td>
<table width="600" cellpadding="0" cellspacing="0" align="center">
还要添加适当的结束标签。
【讨论】：
我清理了你的代码。正如 Gwesolo 所说，你的桌子周围需要一些 tr 和 td。
<!DOCTYPE html>
<html>
<head>
<title>Elixir OPTIWEB Coating</title>
</head>
<body bgcolor="#E9EAEA">
<table width="100%" cellpadding="0" cellspacing="0" align="center">
<tr>
<td width="100%" align="center">
<table width="600" cellpadding="0" cellspacing="0" align="center">
<tr>
<td><img src="assets/header.jpg" />
</td>
</tr>
<tr>
<td align="center"><img src="assets/packaging-eyecandy.jpg" />
</td>
</tr>
<tr>
<td style="background-color: #282727; color: #FFF;">
<h1 style="font-size: 18px; font-family: sans-serif; margin-bottom: 0; padding: 5px 5px 0 5px;">INTRODUCING OPTIWEB™ COATING</h1>
<p style="font-size: 12px; font-family: sans-serif; padding: 0 5px 5px 5px; margin-top: 5px;">Elixir® OPTIWEB Coated Electric Guitar Strings feature a crisp tone that sounds indistinguishable from uncoated strings and a more natural familiar feel than both NANOWEB® and POLYWEB® Coated Strings without sacrificing the extended tone life that players have come to expect from Elixir Strings.</p>
</td>
</tr>
</table>
<!--2 column-->
<table width="600" cellpadding="0" cellspacing="0" style="background-color: #FFF; padding-bottom: 20px;" align="center">
<tr>
<td><img style="margin-top: 10px;" src="assets/string-closeup.jpg" />
</td>
<td>
<h2 style="font-size: 14px; font-family: sans-serif; margin-top: 5px; margin-bottom: 0; padding-left: 10px; padding-right: 10px;">Unlike other string brands, Elixir Strings coats the whole string</h2>
<p style="font-size: 12px; font-family: sans-serif; margin-top: 5px; margin-bottom: 5px; padding-left: 10px; padding-right: 10px;">The NANOWEB, POLYWEB and OPTIWEB Coatings not only protect the outer string surface, but also the gaps between the windings where tone-deadening debris typically builds up in other brands' coated and uncoated guitar strings. Anti-Rust Plating on plain steel strings ensures longer tone life for the entire set.</p>
<a target="_blank" style="display: block;" href="https://www.youtube.com/watch?v=OC6DegDso2Y"><img src="assets/yt-link.jpg" />
</a>
</td>
</tr>
</table>
<!--1 column-->
<table width="600" cellpadding="0" cellspacing="0" style="background-color: #FFF;" align="center">
<tr>
<td align="center">
<hr style="margin: 5px;" />
<h2 style="font-size: 18px; font-family: sans-serif; margin-bottom: 0; margin-top: 5px; padding-left: 10px; padding-right: 10px;">The range to meet the playing style of every electric guitarist</h2>
<p style="font-size: 12px; font-family: sans-serif; margin-top: 5px; padding-left: 10px; padding-right: 10px;">With the introduction of OPTIWEB Coating, Elixir Strings satisfies player demands.</p>
</td>
</tr>
<tr>
<td align="center">
<img src="assets/chart.jpg" />
</td>
</tr>
<tr>
<td align="center">
<img src="assets/ab-chart.jpg" />
</td>
</tr>
<tr>
<td>
<h2 style="font-size: 14px; font-family: sans-serif; padding-left: 10px; padding-right: 10px; margin-bottom: 5px;">Musicians can't hear the difference between OPTIWEB Coated and uncoated strings</h2>
<p style="font-size: 12px; font-family: sans-serif; padding-left: 10px; padding-right: 10px; margin-top: 0;">Uncoated and coated players alike confirm that OPTIWEB Coated Electric Strings have the same tone as uncoated strings.* Hear for yourself with our A/B sound test that compares OPTIWEB Coated Electric Strings with uncoated strings!
<span>*Elixir Strings electric tone and feel field trials</span>
</p>
</td>
</tr>
<tr>
<td align="center">
<a target="_blank" style="display: block;" href="http://www.elixirstrings.com/experience/"><img style="margin: 10px 0;" src="assets/hear-the-difference.jpg" />
</a>
</td>
</tr>
<tr>
<td>
<h2 style="font-size: 14px; font-family: sans-serif; padding-left: 10px; padding-right: 10px; margin-bottom: 5px;">GEAR UP SWEEPSTAKES!</h2>
<p style="font-size: 12px; font-family: sans-serif; padding-left: 10px; padding-right: 10px; margin-top: 0;">All OPTIWEB Coated Electric String Sets will include a game piece for a chance to win impressive weekly, monthly and grand prizes in the consumer sweepstakes. Look for specially marked packages!
<span>*Sweepstakes is not open to residents of Quebec.</span>
</p>
</td>
</tr>
<tr>
<td align="center">
<img style="margin: 10px 0;" src="assets/learn-more.jpg" />
</td>
</tr>
<tr style="background-color: #282727; height: 30px;">
<td align="center">
<img style="margin-top: 5px;" src="assets/coast-logo.jpg" />
</td>
</tr>
<tr style="background-color: #282727; color: #FFF;">
<td>
<p style="font-size: 12px; font-family: sans-serif; text-align: center; margin-top: 5px; margin-bottom: 10px;">Copyright © 2017 Coast Music, All rights reserved.
<br /> Our mailing address is: Coast Music 21000 Trans-Canadienne Baie-d'urfe, Qc H9X 4B7 Canada</p>
</td>
</tr>
</table>
</td>
</tr>
</table>
</body>
</html>
【讨论】：