On both iOS and Android I'm seeing my email render at 50% or 1/2 the with of the screen space available. I've seen a fix for this in the past but it doesn't seem to be working anymore. The previous fix (for iOS at least) advised including the following code in the <head> :

<meta name="x-apple-disable-message-reformatting" />

By all accounts it worked at the time but the post I pulled this from is 7 months old now so I'm wondering if it's still valid?

Here's the issue I'm seeing in Outlook on both Android and iOS: