I like email hacks that are self explicit. I’m thinking about things like “@media yahoo” to target Yahoo, “[owa] .foo” to target Outlook.com or conditional comments to target Outlook. I hate to read someone else’s code and wonder “Why is he doing that?”.

Rémi Parmentier

https://litmus.com/blog/spotlight-remi-parmentier?utm_campaign=litmus_weekly&utm_source=pardot&utm_medium=email