Exit code: 0
!john, john@another.example.com
| /bin/true
Exit code: 99
!john@another.example.com
| /bin/true
Exit code: 99
!john, john@another.example.com
| /bin/true
Exit code: 0
!john, john@another.example.com
| /bin/true
Exit code: 0
|/usr/bin/foo
!john
Exit code: 99