[Dovecot] Filesystem quotas

[Steve Fatula]

I am wondering if I really need to use dovecot quota functions or not. Assume for the moment, that, each system user has a quota defined using Linux quotas, and that the Maildir is within their quota limited directory. So, any mail (or files created by the user etc) that would exceed the quota obviously can't be created. 

In such an environment, is there any advantage to implementing the same quota already defined in the filesystem via dovecot? Or, can I just make things simpler and ignore dovecot quotas? Assuming I keep the index and control files out of the quota limited directories.

I presume if exceeding filesystem quota, the mail will not be delivered of course. If using lmtp, I presume it stays in the queue to retry later for some period of time.
 
Steve