Sam Varshavchik wrote:
> There may not be apparent problems with quota-reporting itself, but 
> filesystem-enforced quotas are generally problematic. When a mailbox 
> goes over its quota and the IMAP server begins reporting errors from 
> ordinary filesystem operations, many poorly-written IMAP clients will 
> keel over, and, pretty much, lock the user out completely.
> 
> Filesystem quotas are not recommended.

Hi Sam,

Thanks for the reply, but I'm a little confused. I find two places at 
courier-mta.org that recommend the use of filesystem quotas whenever 
possible:

http://www.courier-mta.org/imap/README.maildirquota.html
http://www.courier-mta.org/maildirquota.html

Is this recommendation obsoleted?

Intelligent filesystem quota implementation can mitigate client-side 
issues. Soft quotas give users the time they need to clean up before 
hitting the hard quota (my patch reports the soft quota). Once the hard 
quota is reached, the quota can be extended temporarily. The "locking 
out" you describe is not entirely undesirable in every situation, as it 
provides cause for administrative pressure to reduce disk usage ;-)

Thanks again!

-- 
Peter Goerzen
I.S. Development
Hustler Turf Equipment


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