On 06 Apr 2021, bcw142 said the following...
I've been fighting to get echomail to work after updating to A47 after
the last crash. The semaphores aren't working at all in my system.
There was an April fools update: v1.12 A47 2021/04/01 and it does seem to
have fixed the issue with semaphores. I shut off the mailin script and
things seem to be working. So as usual, we need to keep up ;)
--- Mystic BBS v1.12 A47 2021/04/01 (Raspberry Pi/32)
* Origin: Mystic Pi BBS bcw142.zapto.org:23 (21:1/145)