Right. It was a FreePBX 14 test machine. and not the production. Not having indication of the server in the mail alert made it harder for me to understand.
Thanks
The 75% drives me a little nutz too !! Be nice if it was a menu item somewhere so I could up it to 85% or something.
On my system this occurs when the log files or backups get out of control. Have a look and clean out
/var/log/asterisk
/var/spool/asterisk/backup
Some more permanent fixes:
You can specify to store less backups in the freepbx settings. You can also specify the size of max size of log files and the number you want to keep as part of log file rotation (I do this using the webmin interface).
Otherwise the brutal way if you are desperate for peace could be to just delete your email out of the freepbx system admin /storage notifications box. Serenity now !! (I think you get them as part of root emails too though)