Gmail automatically inserts a link around phone numbers
Both the desktop and mobile version(s) of Gmail now insert an anchor link around phone numbers. In the desktop version,
Read moreGmail’s DOCTYPE can affect line height
You might see some lines of text (especially small text) with more line-height than expected because of the Gmail DOCTYPE.
Read moreGmail doesn’t allow backgrounds (mostly)
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
Read moreGmail ignores margin and padding properties if they have a negative value
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
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