Igor, Thanks for your reply.
I have installed the latest version of onyx (17.8.11). After enabling debug mode I still only receive the message below:
2020-01-30T13:17:02+00:00 ERR: HORDE [horde] FAILED LOGIN for
[email protected] (
[email protected]) [83.82.184.89] to horde [pid 18079 on line 215 of...