Rogerio da Silva Blog

If you include any reference to a URL, your entire declaration will be ignored. For example: background: #000;  /*This will be accepted */    background: #000 url(http://www.test.com/test.jpg); /* This entire line will be ignored */  With

Gmail ignores the entire margin or padding declaration if there is a negative value. margin:-40px 10px 0 0 margin:40px -10px 0 0 margin-top: -40px margin-right: -40px padding-right: -40px padding-top: -40px 

Gmail converts this: <td style=“height: 20px;”></td>  To this: <td style=“min-height: 20px;”></td>  The min-height property does not have the same effect as the “height” property

#1155CC is the default colour for Gmail links. You can overwrite this colour using inline CSS. However, Gmail ignores #000,

One way to get around this issue is to convert your embedded CSS into inline using our CSS conversion tool

This might make you think you can’t hide anything in Gmail. The following code will be ignored by Gmail. style=“display:none;”