> If that's the case, the logs are probably under
> /var/log/qmail.

Yes, they are there. But there are a lot of logfiles. the listing is:

[root@mx qmail]# ls -al
total 32
drwxr-x--- 8 qmaill qmail 4096 Jul 25 20:50 .
drwxr-xr-x 4 root root 4096 Aug 3 21:35 ..
drwxr-x--- 2 qmaill qmail 4096 Sep 4 16:20 imap4
drwxr-x--- 2 qmaill qmail 4096 Aug 28 15:04 imap4-ssl
drwxr-x--- 2 qmaill qmail 4096 Sep 8 13:52 pop3
drwxr-x--- 2 qmaill qmail 4096 Aug 28 15:04 pop3-ssl
drwxr-x--- 2 qmaill qmail 4096 Sep 5 21:33 send
drwxr-x--- 2 qmaill qmail 4096 Sep 8 01:45 smtp
[root@mx qmail]#

In each folder are files. example in folder smtp:
[root@mx qmail]# cd smtp/
[root@mx smtp]# ls -al
total 852
drwxr-x--- 2 qmaill qmail 4096 Sep 8 01:45 .
drwxr-x--- 8 qmaill qmail 4096 Jul 25 20:50 ..
-rwxr--r-- 1 qmaill nofiles 98037 Aug 20 20:24
@400000003f43bce3394c387
4.s
-rwxr--r-- 1 qmaill nofiles 98070 Aug 22 12:11
@400000003f45ec5d089b7bc
c.s
-rw-r--r-- 1 qmaill nofiles 72449 Aug 28 05:07
@400000003f4dc79f0836ca7
4.u
-rw-r--r-- 1 qmaill nofiles 50 Aug 28 11:12
@400000003f4dfddc261ecbf
4.u
-rwxr--r-- 1 qmaill nofiles 98042 Aug 30 04:02
@400000003f5005ba10dc6dd
c.s
-rwxr--r-- 1 qmaill nofiles 98132 Sep 1 20:15
@400000003f538ccb1959d86
4.s
-rwxr--r-- 1 qmaill nofiles 98063 Sep 3 14:36
@400000003f55e05212793d8
c.s
-rwxr--r-- 1 qmaill nofiles 98052 Sep 5 14:35
@400000003f58832b2f79d4d
c.s
-rwxr--r-- 1 qmaill nofiles 98100 Sep 8 01:45
@400000003f5bc329382bc89
c.s
-rw-r--r-- 1 qmaill nofiles 58894 Sep 8 17:09 current
-rw------- 1 qmaill nofiles 0 Jul 25 21:02 lock
-rw-r--r-- 1 qmaill nofiles 0 Aug 28 15:04 state
[root@mx smtp]#

But I search one logfile for analyzing with awstats or analyzer.

Greets and thx for help

Chrigi Hartmann