not receiving notification

I've got my preferences set to receive notification of held messages 
Sunday thru Thursday.  However, I'm not getting these reports... our 
network uses Barracuda and I whitelisted spamcop there, but I'm still 
not getting them regularly.  Just one on this Monday.  But when I looked 
at my held mail there was a whole stack, several days' worth.

Is this a spamcop problem or something else?  If the latter, where else 
can I look?  I'm also asking our Barracuta folks.
Thanks