tl;dr I found some quirky software from the dotcom boom and restored it to working order.
For my birthday in 2021 a friend sent me a Sega-themed happy birthday, and my mind immediately went back to DreamFlyer. I decided I was going to reply with something composed in DreamFlyer. […] I spent a few minutes composing the flyer, covering it in all manner of stamps, took a screenshot and replied. And then I wondered, what if I tried emailing it again?
I found a copy on Yahoo Auctions for ¥350