Introduction to Customizing Thunderbird This is a beginner-to-beginner document. I can’t emphasize that enough. What I mean is I'm no expert, I've just put together this based on my learnings so far. After many years of bouncing around email clients, I found myself quite dissatisfied with the options. First, I’m on Windows 10. The Mail app in Windows was actually pretty good. I used it in conjunction with Outlook 365 because I had a license for that from my company while I was employed. But mostly I used Windows Mail. Then Microsoft got rid of that and pointed everyone to New Outlook – nope. I tried a ton of new email clients but they all had issues on things that I didn't like. I settled on Thunderbird (TB) just before Supernova (v.115) was launched. I used TB in the 2000s but forgot why I dropped it. But coming back to it was pretty good right out of the box using three gmail accounts and an outlook account. But, I had also joined Reddit and the