btrfs for mail_attachment_dir

[Marc Stürmer]

Am 25.02.2015 um 12:24 schrieb Hardy Flor:

> I don't find  any indication, that no btrfs for then filesystem for the
> path in "mail_attachment_dir" is to be used. but btrfs has a big problem
> with hard links in the same directory.
> Nuisance is the only deal with a different file system?

Btrfs is still nowhere near production ready in 2015. If you want to run 
a server, which should be reliable, use ext4 oder maybe XFS instead. Or 
ZFS, if you need a COW.

If you are feeling adventurous, then use btrfs.