Have just tried logging into a mailbox that just sits with the spinning grey wheel, whilst running journalctl -f and have the following output:-
Mar 07 09:13:09 Grommunio systemd[1]: gromox-zcore.service: Main process exited, code=killed, status=11/SEGV
Mar 07 09:13:09 Grommunio systemd[1]: gromox-zcore.service: Failed with result 'signal'.
Mar 07 09:13:09 Grommunio systemd[1]: systemd-coredump@5-16458-0.service: Deactivated successfully.
Mar 07 09:13:09 Grommunio systemd[1]: gromox-zcore.service: Scheduled restart job, restart counter is at 6.
Mar 07 09:13:09 Grommunio systemd[1]: Stopped Gromox zcore service.
Mar 07 09:13:09 Grommunio systemd[1]: Started Gromox zcore service.
Mar 07 09:13:09 Grommunio zcore[16468]: gromox-zcore 2.25.26.gf86b6ba (pid 16468 uid 0)
Mar 07 09:13:09 Grommunio zcore[16468]: system: maximum file descriptors: 524288
Mar 07 09:13:09 Grommunio zcore[16468]: system: SMTP server is smtp://[::1]:25
Mar 07 09:13:09 Grommunio zcore[16468]: Reexecing /usr/libexec/gromox/zcore
Mar 07 09:13:09 Grommunio zcore[16468]: gromox-zcore 2.25.26.gf86b6ba (pid 16468 uid 479)
Mar 07 09:13:09 Grommunio zcore[16468]: system: maximum file descriptors: 524288
Mar 07 09:13:09 Grommunio zcore[16468]: system: SMTP server is smtp://[::1]:25
Mar 07 09:13:09 Grommunio zcore[16468]: ldap_adaptor: default host <ldapi:///>, base <>, #conn=8, mailattr=mail
Mar 07 09:13:09 Grommunio zcore[16468]: mysql_adaptor: Current schema n131 is recent.
Mar 07 09:13:09 Grommunio zcore[16468]: timer_agent: timer address is [::1]:6666
Mar 07 09:13:09 Grommunio zcore[16468]: system: zcore is now running
So it looks like Zcore is crashing when login is attempted to the mailbox. Any ideas on how to fix. Only seems to affect GR Web client - but I am using a test VM (clone of my live server with the updates mentioned in post #1.