The exim4 log is showing dovecot_lda transport errors on message receipt:
1pUGAd-002CIY-MS <user@my-brilliant.example.com>: dovecot_lda transport output: lda(user@my-brilliant.example.com): Error: net_connect_unix(/run/dovecot/stats-writer) failed: Permission denied
sympl@alphacabbage1:/var/log$ sudo ls -al /run/dovecot/stats-*
srw------- 1 root root 0 Feb 21 15:17 /run/dovecot/stats-reader
srw-rw---- 1 root dovecot 0 Feb 21 15:17 /run/dovecot/stats-writer
doveconf shows:
service stats {
chroot =
client_limit = 0
drop_priv_before_exec = no
executable = stats
extra_groups =
group =
idle_kill = 4294967295 secs
privileged_group =
process_limit = 1
process_min_avail = 0
protocol =
service_count = 0
type =
unix_listener stats-reader {
group =
mode = 0600
user =
}
unix_listener stats-writer {
group = $default_internal_group
mode = 0660
user =
}
user = $default_internal_user
vsz_limit = 18446744073709551615 B
}
It’s possibly an artefact from a symbiosis migration – do the permissions look normal? It could also be more widespread as I think I’ve turned up Exim’s protocol error logging.
Environment 
- Sympl Version [11]:
- Sympl Testing Version [no]
- Debian Version [bullseye]:
- Hardware Type [virtual]
- Hosted On [mythic-beasts]