Today this same problem occur again:
Jun 7 11:02:35 server send: delivery 85: failure: user_is_over_quota/
In kloxo settings there is no signal of use being in over quota, user use around 1200MB in total, and 16GB is configured as Total Disk Usage (MB).
How do I solve now problem?
Now I try to change approach, I changed from 16000 MB to 2000MB, and user_is_over_quota message in maillog disappear, and everything is fine
.
So, there is some bug in calculation of Total Disk Usage (MB), and to get rid of this messages in future, for this user I will everything turn on to UNLIMITED.
Just posting this for your info.
BR.