Update:
Setting a dns MX record with an A name as opposed to a Cname fixed the "line 460" error.
The script "zmsetup.pl" then went on to install and even displayed the menu where I could enter the admin password. (I may have passed over this on the 1st install or maybe it never appeared; I can't honestly say which

)
Now I can send an email, but so far not receive any( they are in the deferred queue) ; will reexamine my configurations.
Very nice though.
Regards
Steve