ext2/3 vs xfs for maildir

[Stan Hoeppner <stan@hardwarefreak.com>]

Which filesystem is more appropriate for maildir use on a Postfix/Dovecot
system, ext2/3 or xfs?  This maildir will be storing mulitple mail folders and
files, some folders containing over 10,000 email files.

If xfs, what is the most appropriate mkfs.xfs command line for creating the
filesystem best tuned for the above described maildir?  I have no previous
experience with xfs beyond reading about its superior performance for some
workloads.

Thanks much in advance.  Happy new year all.

--
Stan