mgr@acme.net
ipadm@acme.net
abuse@acme.net
mgr@acme.net
ipadm@acme.net
abuse@acme.net

##</code><code>##

my @saw; 
@emails = grep(!$saw[$_]++, @emails); 

##</code><code>##

Argument "mgr@acme.net" isn't numeric in array element at ./whois.pl line 64.
Argument "ipadm@acme.net" isn't numeric in array element at ./whois.pl line 64.
Argument "abuse@acme.net" isn't numeric in array element at ./whois.pl line 64.
Argument "mgr@acme.net" isn't numeric in array element at ./whois.pl line 64.
Argument "ipadm@acme.net" isn't numeric in array element at ./whois.pl line 64.
Argument "abuse@acme.net" isn't numeric in array element at ./whois.pl line 64.
mgr@acme.net