Wrong quota messages

[Bruce]

Hi!

I created an user with an emailaddress. This emailadress "example@bla.com" is used as a mailing list, using many mailadresses to forward messages, that are send to the mailadress (example@bla.com).
Now, I get wrong quota messages:
Some Users/Groups Are Near Or Already Over Their Quota Limit On Server server.bla.com

The following users are near or already over their quota limit on server server.bla.com:
===================================================

Username:                           web2_forward
Used Storage Space:           94.23 MB
Allocated Storage Space:     50.00 MB
User's Real Name:               OOP
User's Email Address:           forward@bla.com
Web Site:                             www.bla.com
Group Of Web Site:             web2

Customer's Company:           XXX
Customer's Name:                XXX
Customer's Address:             XXX
City:                                      
Country:                               
Telephone:                           
Telefax:                                
Customer's Email Address:   
Customer's Web Site:           http://www.XXX.de

Reseller's Company:              XXX
Reseller's Name:                    XXX
Reseller's Address:                XXX
City:                                      XXX
Country:                                XXX
Telephone:                            XXX
Telefax:                                 
Reseller's Email Address:       XXX
Reseller's Web Site:               XXX

(Links and Addresses are changed by me)

A "du -s" to the users directory shows:

du  -h web2_oop/
8,0K    web2_oop/web
4,0K    web2_oop/Maildir/tmp
4,0K    web2_oop/Maildir/new
4,0K    web2_oop/Maildir/cur
16K     web2_oop/Maildir
140K    web2_oop/

Any idea, why? I get these wrong messages for some web-accounts und for some user-accounts.

Best regards,
Sebastian