HTML formatted email not showing up at all in Gmail but is in other mail clients

Question

I\'m currently sending html formatted emails from PHP\'s mail() function and checking them simply to make sure they are showing up as HTML (formatting aside, I\'m well aware tha

Answer 1

I am updating my answer since it has quite a few views, and new tools are available. I am leaving my original answer for posterity.

Edit * 9/19/19

You can find CSS property support by email client here: https://www.caniemail.com/

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Original Answer:

Gmail does not support the