Is this a Mail Server Error?

I'm trying to remove all errors, that are logged every five minutes.

Some I found in the discussions and removed them.

https://discussions.apple.com/thread/4207019?start=15&tstart=0

This was helpfull. But some errors left.

Jan 26 10:21:18 server com.apple.launchd[1] (com.apple.collabd.expire[1577]): Exited with code: 1
Jan 26 10:21:18 server.mydomain.com sandboxd[1581] ([1578]): collabpp(1578) deny file-read-data /Applications/Server.app/Contents/ServerRoot/usr/lib/libpq.5.5.dylib
Jan 26 10:21:18 server kernel[0]: Sandbox: sandboxd(1581) deny mach-lookup com.apple.coresymbolicationd
Jan 26 10:21:21 server.mydomain.com collabd[154]: [CSContentService:47 411c000 +11ms] Detected Magic Superuser Auth Token

I don't know what it is. Can someone help?