f(x) Email Log is updated to version 1.0.2. This is a minor update. With this update pop-up/modal window to view email content now responsive, and we can view email log properly on mobile phone/tablet. Here’s the screenshot of the plugin modal in action (on my phone) before and after responsive update:
This bug happen because previously the plugin uses thinkbox, a script that is bundled in WordPress. Thinkbox is an outdated script with 5 years bug with no plan of fixing. I think the only reason this script is still in WordPress core is for backward compatibility.