It's been a very long time since I heard about uucico (Unix-to-Unix Copy-In Copy-Out program, part of the UUCP suite). Glad to see it's still being shipped! I wonder if any network uses it.
I've been running it the last year or two to get e-mail to a vintage DOS BBS that had a UUCP package. I was pleasantly surprised it was out of the box usable on both CentOS and Debian, and Postfix still ships with example UUCP email config.