One of our mail servers somehow corrupted it’s root file system in such a manner that it thinks it is out of free space even though it’s at 61%. The fsck program does not fix whatever is wrong so I am restoring from a virtual machine image backup.
There is quite a lot of mail stuck in spool which I hope to copy from the broken image to the backup image.
If all goes smoothly no mail will be lost and only that stuck in spool will be delayed. If that spool is not salvageable than it is possible for some incoming mail to be lost but I do not expect that to be the case.