So I'm coding html of an newsletter and i'm using the inline styles because of restrictions, so my "table layout" is broken because have elements with size bigger than the defined. I realize that an element with 170px of height defined, and inside them have an tag with 170px of height defined, so why using inspect i can see that this have 172px, i think Gmail is ignoring something.
I make a gif to show this in inspector: https://i.sstatic.net/KnXEz.gif
My JSfiddle with my html: http://jsfiddle.net/wtkd/ygfn6qka/ (the boxes with images of mario shows where layout breaks) If you don't want to see in JSfiddle:
<table width="700" align="center" style="background-image: url('http://www.image.test.com/images/bg.jpg'); background-color: #ededed; background-position: center top; background-repeat: no-repeat; margin:0;padding:0;padding: 0; width: 700px; margin: 0 auto;">
<tr width="600" style="border-collapse:collapse;border-spacing:0;">
<td style="border-collapse:collapse;border-spacing:0;">
<table width="600" align="center" border="0" cellpadding="0" cellspacing="0" style=
"border-collapse:collapse;border-spacing:0;">
<thead width="600" style="border-collapse:collapse;border-spacing:0;">
<tr width="600"height="150" style="border-collapse:collapse;border-spacing:0;">
<th width="600" style="border-collapse:collapse;border-spacing:0;">
<img src="http://www.image.test.com/images/header.png" width="600" height="151">
</th>
</tr>
<tr height="104">
<th style="height:104px; border-bottom: 5px #ededed solid;">
<img src="http://www.image.test.com/images/update.png" width="600" height="104">
</th>
</tr>
</thead>
<tbody width="600">
<tr height="170">
<th height="170">
<a style="height:170px;" href="http://www.test.com/motorola-droid-turbo/65466-moto-maxx-chega-oficialmente-brasil-preco-r-xxxx.htm" target="_blank"><img src="http://www.image.test.com/images/moto-maxx.png" width="600" height="170"></a>
</th>
</tr>
<tr height="180">
<th height="170">
<a style="height:170px;" href="http://www.test.com/jogos/65442-explosivo-trailer-gameplay-gta-v-confirma-modo-primeira-pessoa.htm" target="_blank"><img src="http://www.image.test.com/images/gta-v.png" width="600" height="170"></a>
</th>
</tr>
<tr>
<table width="600" height="340" align="center" border="0" cellpadding="0" cellspacing="0" style=
"border-collapse:collapse;border-spacing:0;">
<tr>
<th height="170" style="height: 170px; width: 200px;border-collapse:collapse;border-spacing:0;">
<a style="height: 170px; width: 200px;border-collapse:collapse;border-spacing:0;" href="http://www.test.com/moto-x/65400-analise-review-smartphone-motorola-novo-moto-x-2014.htm" target="_blank"><img src="http://www.image.test.com/images/moto-x.png" width="200" height="170"></a>
</th>
<th height="170" style="height: 170px; width: 200px;border-collapse:collapse;border-spacing:0;">
<a style="height: 170px; width: 200px;border-collapse:collapse;border-spacing:0;" href="http://www.test.com/iphone-6/64640-analise-apple-iphone-6-review.htm" target="_blank"><img src="http://www.image.test.com/images/iphone.png" width="200" height="170"></a>
</th>
<th rowspan="2" height="340" style="width: 200px; height: 340px;border-collapse:collapse;border-spacing:0;">
<a style="width: 200px; height: 340px;border-collapse:collapse;border-spacing:0;" href="http://www.test.com/jogos/65339-personagens-super-mario-viram-brindes-mcdonalds-brasileiro.htm" target="_blank"><img src="http://img.elo7.com.br/product/original/62C89A/painel-mario-bros.jpg" width="200" height="340"></a>
</th>
</tr>
<tr width="400" height="170">
<th height="170" colspan="2" style="border-collapse:collapse;border-spacing:0;">
<a style="width:400px;height:170px;border-collapse:collapse;border-spacing:0;" href="http://www.test.com/celular/65283-dinossauros-9-celulares-marcaram-epoca.htm" target="_blank"><img src="http://cdn.bgr.com/2013/11/super-mario-3d-world.jpg" width="400" height="170"></a>
</td>
</tr>
</table>
</tr>
<tr>
<table width="700" align="center" border="0" cellpadding="0" cellspacing="0" style=
"border-collapse:collapse;border-spacing:0;background:#ededed;">
<tr align="center" height="170" style="border-collapse:collapse;border-spacing:0;">
<th height="170">
<a href="http://www.test.com/cinema/65416-30-filmes-2015-voce-querer-ver-cinemas-estreias-lancamentos.htm" target="_blank"><img src="http://www.image.test.com/images/filmes.png" width="600" height="170"></a>
</th>
</tr>
<tr height="180" align="center" style="border-collapse:collapse;border-spacing:0;">
<td colspan="2" style="width:400px;height:170px;border-collapse:collapse;border-spacing:0;">
<img src="http://www.image.test.com/images/grupo-nzn.jpg" width="600" height="180">
</td>
</tr>
</table>
</tr>
</tbody>
</table>
</td>
</tr>
Someone can help about this?
You need to put display:block; inline on all your img tags.