Error: file_preallocate in logs

[Ricardo Branco]

I am getting lots of these messages in my imapd.log or while I am doing mailbox operations on the terminal.

All my mailboxes are stored on NFS and ive set the nfs locking params in the config, only one mailserver accessing this 
share.

Any ideas why this would be happening?


doveadm(ops): Error: 
file_preallocate(/var/vmail/ops/mdbox/storage/.temp.1507551663.P21424Q109M878872.posti2.dc1.wenn.com) failed: Operation 
not supported