disable logging

[Woerns Urstmann]

how can i disable this excessive logging to my syslog? i really can't find 
any "debug" switch in my setup.

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Jan 16 19:25:56 wurstbude saslauthd[2176]: dbuser changed.
Jan 16 19:25:56 wurstbude saslauthd[2176]: dbpasswd changed.
Jan 16 19:25:56 wurstbude saslauthd[2176]: host changed.
Jan 16 19:25:56 wurstbude saslauthd[2176]: database changed.
Jan 16 19:25:56 wurstbude saslauthd[2176]: table changed.
...
...
Jan 16 19:26:51 wurstbude imapd[14971]: SQUAT failed to open index file
Jan 16 19:26:51 wurstbude imapd[14971]: SQUAT failed
Jan 16 19:26:51 wurstbude imapd[14971]: SQUAT failed to open index file
Jan 16 19:26:51 wurstbude imapd[14971]: SQUAT failed
Jan 16 19:26:51 wurstbude imapd[14971]: SQUAT failed to open index file
Jan 16 19:26:51 wurstbude imapd[14971]: SQUAT failed
...
...
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thanks 
jens