How to change MailBox Location in Postfix to Network Drive(NAS) from location computer.

In Mac OS x, i have configure Mail server(IMAP) with Postfix & Devcot. the system storage is only 256 GB. i want to alocate 50GB each to my user( 80 Approx). how do change the default mail storage location to my NAS drive( 12TB).

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Once your NAS is mounted you can specify the directory like this:

sudo postconf mail_spool_directory=/Location/Mail/

where /Location/Mail is the directory. This will only work if home_mailbox is not set:

sudo postconf home_mailbox=