undefined ACL named.conf

i cant start Messages service on osx server (mountain lion and macbook air)

This is the log:

(org.postfix.master[63801]): Exited with code: 1

Aug 19 15:27:31 myserver com.apple.launchd[1] (org.postfix.master): Throttling respawn: Will start in 9 seconds

Aug 19 15:27:37 myserver.dyndns.org named[63805]: starting BIND 9.8.1-P1 -f

Aug 19 15:27:37 myserver.dyndns.org named[63805]: built with '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--disable-dependency-tracking' '--prefix=/usr' '--sysconfdir=/private/etc' '--localstatedir=/private/var' '--enable-atomic=no' '--with-openssl=yes' '--with-gssapi=yes' '--enable-symtable=none' 'CC=/Applications/Xcode.app/Contents/Developer/Toolchains/OSX10.8.xctoolchain/u sr/bin/cc' 'CFLAGS=-arch i386 -arch x86_64 -g -Os -pipe -gdwarf-2 ' 'LDFLAGS=-arch i386 -arch x86_64 -framework IOKit -framework CoreFoundation' 'CXX=/Applications/Xcode.app/Contents/Developer/Toolchains/OSX10.8.xctoolchain/ usr/bin/c++' 'CXXFLAGS=-arch i386 -arch x86_64 -g -Os -pipe '

Aug 19 15:27:37 myserver.dyndns.org named[63805]: /private/etc/named.conf:20: undefined ACL 'myserver.dyndns.org'

Aug 19 15:27:37 myserver.dyndns.org named[63805]: loading configuration: failure

Aug 19 15:27:37 myserver.dyndns.org named[63805]: exiting (due to fatal error)

Aug 19 15:27:37 myserver com.apple.launchd[1] (org.isc.named[63805]): Exited with code: 1

Aug 19 15:27:37 myserver com.apple.launchd[1] (org.isc.named): Throttling respawn: Will start in 10 seconds

Aug 19 15:27:40 myserver.dyndns.org postfix/master[63808]: fatal: chdir /Library/Server/Mail/Data/spool: No such file or directory

Aug 19 15:27:41 myserver com.apple.launchd[1] (org.postfix.master[63808]): Exited with code: 1

Aug 19 15:27:41 myserver com.apple.launchd[1] (org.postfix.master): Throttling respawn: Will start in 9 seconds

Aug 19 15:27:42 myserver com.apple.launchd[1] (org.calendarserver.calendarserver[63809]): Exited with code: 1

Aug 19 15:27:42 myserver com.apple.launchd[1] (org.calendarserver.calendarserver): Throttling respawn: Will start in 59 seconds

Aug 19 15:27:47 myserver.dyndns.org named[63819]: starting BIND 9.8.1-P1 -f

Aug 19 15:27:47 myserver.dyndns.org named[63819]: built with '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--disable-dependency-tracking' '--prefix=/usr' '--sysconfdir=/private/etc' '--localstatedir=/private/var' '--enable-atomic=no' '--with-openssl=yes' '--with-gssapi=yes' '--enable-symtable=none' 'CC=/Applications/Xcode.app/Contents/Developer/Toolchains/OSX10.8.xctoolchain/u sr/bin/cc' 'CFLAGS=-arch i386 -arch x86_64 -g -Os -pipe -gdwarf-2 ' 'LDFLAGS=-arch i386 -arch x86_64 -framework IOKit -framework CoreFoundation' 'CXX=/Applications/Xcode.app/Contents/Developer/Toolchains/OSX10.8.xctoolchain/ usr/bin/c++' 'CXXFLAGS=-arch i386 -arch x86_64 -g -Os -pipe '

Aug 19 15:27:47 myserver.dyndns.org named[63819]: /private/etc/named.conf:20: undefined ACL 'myserver.dyndns.org'

Aug 19 15:27:47 myserver.dyndns.org named[63819]: loading configuration: failure

Aug 19 15:27:47 myserver.dyndns.org named[63819]: exiting (due to fatal error)

Aug 19 15:27:47 myserver com.apple.launchd[1] (org.isc.named[63819]): Exited with code: 1

Aug 19 15:27:47 myserver com.apple.launchd[1] (org.isc.named): Throttling respawn: Will start in 10 seconds