I'm still using Eudora because I can't bear to part with it! Yes, its poor HTML renderer and lack of UTF-8 support, amongst other things, have no place in 2023, but other modern mail clients still seem to fall short on the features Eudora just gets right.

There's hope that the HERMES Mail project, which was formed after the Eudora source code was release, will one day be a viable replacement:

https://sourceforge.net/projects/hermesmail/

Wow, there's a name I haven't seen since I was running a (pre-linux) Windows NT 4 box back in like 1996/7.

I used that until I moved to Linux, and I used sylpheed on top of maildir.

I've used Thunderbird now for years, but I also use fastmail as the mail server and use offlineimap for backing fastmail up locally.

I've got email archives going back to 1998 (which is probably when I moved off Windows NT, come to think of it).

My parents still run Eudora 7, can't convince them to switch to anything else...

For your future self: At some point they may ask you for some tech support to get their secure connection to mail servers working again. Start with the HermSSL package available here: https://sourceforge.net/projects/hermesmail/files/

Was just thinking that the other day. But Eudora, like Tbird until a short time ago, had issues with HTML mail (_1997_ era HTML maiil).

Still, if you ever do dive in I'm up for doing some beta testing!