Your output looks doubled.  Did you run it twice - once with Alpha($_) uncommented and once with Omega($_) uncommented, or what?

Strangely, today when I run my one liners on my webhost I seem to be getting 100% positive (i.e. wrong) results, regardless of the domain, as long as the address syntax is correct.  For example:

$ echo "a@abczz123ffz.com" | perl -MMail::CheckUser=check_email,last_check -ne 'BEGIN{$Mail::CheckUser::Skip_SMTP_Checks = 1};chomp;for $i (0..9){print "$_ -> ";if (check_email($_)){print "OK\n"}else{print last_check()->{reason}."\n"}}'
a@abczz123ffz.com -> OK
a@abczz123ffz.com -> OK
a@abczz123ffz.com -> OK
a@abczz123ffz.com -> OK
a@abczz123ffz.com -> OK
a@abczz123ffz.com -> OK
a@abczz123ffz.com -> OK
a@abczz123ffz.com -> OK
a@abczz123ffz.com -> OK
a@abczz123ffz.com -> OK

Thanks.

Your output looks doubled. Did you run it twice - once with Alpha($_) uncommented and once with Omega($_) uncommented, or what?

Yes I did , its why the output is slightly different format each time

Just tried it on a different host and the results are 100% negative (i.e. correct). Any ideas?

Just the same ones :) Try adding this and see what you get

use Mail::CheckUser qw/ check_email last_check  /;
BEGIN{
    $Mail::CheckUser::Skip_SMTP_Checks = 1;
    $Mail::CheckUser::Treat_Timeout_As_Fail = 1;
    $Mail::CheckUser::Debug = 1;
}
[download]

or maybe look inside :) look at what its doing ... so i do that and I try I get

Read more... (2 kB)

So this mean my local DNS server is telling me those adresses don't really exist

Maybe your DNS server is lying to you , it happens, DNS hijacking

Thanks again, Anonymous Monk!

I'm looking into those things now.