$ ps aux | grep cyrus
cyrus     1294  0.0  0.0 126256  8112 ?        S    16:23   0:00 imapd -s -U 30
cyrus     1695  0.0  0.0  57036  3544 ?        Ss   Nov20   0:03 /usr/sbin/cyrmaster -d
cyrus     3656  0.0  0.0  83708  2408 ?        S    Nov20   0:00 notifyd
root     10779  0.0  0.0  11540   892 pts/1    S+   21:12   0:00 grep cyrus

Nov 21 20:13:47 debian cyrus/imaps[20647]: unable to get private key from '/.../private.key'
Nov 21 20:13:47 debian cyrus/imaps[20647]: TLS server engine: cannot load cert/key data, may be a cert/key mismatch?
Nov 21 20:13:47 debian cyrus/imaps[20647]: error initializing TLS
Nov 21 20:13:47 debian cyrus/imaps[20647]: Fatal error: tls_init() failed