You need to write html like it's 1999. Use tables for layouts, avoid divs. Be very cautious with CSS. See: https://www.campaignmonitor.com/css/ https://www.camp

You need to write html like it's 1999. Use tables for layouts, avoid divs. Be very cautious with CSS. See: https://www.campaignmonitor.com/css/ https://www.campaignmonitor.com/css/ For testing, either use Campaign Monitor for $5/test (across all the clients) -- https://www.campaignmonitor.com/ https://www.campaignmonitor.com/ They repackage Litmus testing which is ~ $80/mo -- https://litmus.com/ https://litmus.com/ To inline CSS there are lots of options, but this is a nice, free utility: http://putsmail.com/ http://putsmail.com/ Overall designing HTML emails sucks. It will take 10x more time than you think.