Have you tried a "real" email app (i.e., one that's not just a wrapper)? I've used K9 (Android) + FastMail for many years and it's been great. K9 has tons of fe

Have you tried a "real" email app (i.e., one that's not just a wrapper)? I've used K9 (Android) + FastMail for many years and it's been great. K9 has tons of features, including letting you choose font size (with some granularity - e.g. you can have different sizes for from/subject/body, folder/message view, etc.).