quota warning

[Tamer Uz]

Hello,

i have slackware 7.1
cyrus-imap 1.6.24
imp 2.2

I managed to establish quota restriction on my users.
However i can't make my users to get quota warnings
when they are 90% of their quota, and after they are
fill up with their quota.

Is there anybody knowing how to do this. 

Thank you for your help.

Tamer UZ.

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