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 moreAuthor: Rogerio da Silva
Gmail’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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