Hello everybody, first of all I just wanna say that Zimbra is aweseome I got an Ubuntu Srv 8.04 Box with Zimbra 6.0.2 and I've got a problem wich is driving me crazy. I cannot understand why I got so many delivered messages! Here's my daily mail report

Grand Totals
------------
messages

1159 received
21123 delivered
0 forwarded
343 deferred (22448 deferrals)
9163 bounced
211 rejected (0%)
0 reject warnings
0 held
0 discarded (0%)

58508k bytes received
90290k bytes delivered
152 senders
125 sending hosts/domains
17622 recipients
3474 recipient hosts/domains


Per-Hour Traffic Summary
time received delivered deferred bounced rejected
--------------------------------------------------------------------
0000-0100 7 7 0 0 0
0100-0200 7 7 0 0 0
0200-0300 6 6 0 0 2
0300-0400 9 17 0 0 7
0400-0500 6 6 0 0 2
0500-0600 9 10 0 0 2
0600-0700 8 8 0 0 5
0700-0800 7 7 0 0 2
0800-0900 18 18 0 0 5
0900-1000 39 39 1 0 1
1000-1100 54 53 3 0 2
1100-1200 45 50 7 3 6
1200-1300 29 29 3 0 28
1300-1400 32 28 3 1 21
1400-1500 26 25 5 2 6
1500-1600 27 29 5 1 2
1600-1700 28 31 2 0 0
1700-1800 24 25 4 0 8
1800-1900 15 15 1 1 19
1900-2000 6 6 2 0 14
2000-2100 4 4 2 0 4
2100-2200 127 3152 583 2008 6
2200-2300 367 10257 15697 3029 7
2300-2400 259 7294 6130 4118 62


As you can see, from 21 to 24 I'm getting more but i dont' get why I get so many delivered messages.. is that because of bouncing? I'm sure it's not a client cuz at that time nobody's connected. Sorry I'm quite a noob in reading these logs but I got listed in a bunch of rbl and I can't find out a solution.

Thanks in advance for your help.