Presently MXes have a 20G root filesystem only which is normally about half utilized.
Filesystem Size Used Avail Use% Mounted on /dev/vda1 19G 11G 7.2G 60% /
It was seen today that a significant spike in deferred mail caused the exim mainlog to become quite large (5+ GB) and nearly fill the disk.
Let's consider how best to add some space to these hosts, and also think about how to prevent large logs from filling the root filesystem which would interrupt mail flow.