1999-03-02 09:44:33 10HmaX-0005vi-00 <= CALLER@test.ex U=CALLER P=local S=sss
1999-03-02 09:44:33 10HmaX-0005vi-00 Frozen by the system filter
1999-03-02 09:44:33 10HmaY-0005vi-00 <= <> U=CALLER P=local S=sss
1999-03-02 09:44:33 10HmaY-0005vi-00 ** unknown@test.ex: Unrouteable address
1999-03-02 09:44:33 10HmaY-0005vi-00 Frozen (message created with -f <>)
1999-03-02 09:44:33 10HmaZ-0005vi-00 <= <> U=root P=local S=sss
1999-03-02 09:44:33 10HmaZ-0005vi-00 ** unknown@test.ex: Unrouteable address
1999-03-02 09:44:33 10HmaZ-0005vi-00 Frozen (delivery error message)