anarcat@emma:~$ mbsync anarcat
C: 0/1  B: 0/0  F: +0/0 *0/0 #0/0  N: +0/0 *0/0 #0/0imap(anarcat): Error: net_connect_unix(/run/dovecot/stats-writer) failed: Permission denied
C: 0/1  B: 0/209  F: +0/0 *0/0 #0/0  N: +0/0 *0/0 #0/0
Warning: lost track of 11575 pulled message(s)
C: 0/1  B: 0/209  F: +0/0 *0/0 #0/0  N: +72/11575 *0/0 #0/0^C

I confirmed that I had 400k+ messages and that the count was growing
as the messages were coming in, which is Real Bad(tm).