On 28 Dec 2020, Aaron Thomas said the following...
 
 AT> Let me know what you make of this. I suspect there's something up with 
 AT> "Waiting for BUSY nodes."

Try running ./fidopoll killbusy (or ./mis poll killbusy) and then try again. 
That should delete any .bsy files that may be stopping your mail from flowing.

Jay

--- Mystic BBS v1.12 A47 2020/11/23 (Raspberry Pi/32)