I also tried use Mail::Mailer and use Net::SMTP at the top, no dice

To find the perlbrew perl open up Terminal and type in:

echo $PERLBREW_PATH

Sample output:
/Users/user/perl5/perlbrew/bin:/Users/user/perl5/perlbrew/perls/perl-5
+.14.1/bin
[download]

#!/Users/user/perl5/perlbrew/perls/perl-5.14.1/bin/perl5.14.1
[download]

"#!/Users/user/perl5/perlbrew/perls/perl-5.14.1/bin/perl5.14.1"

That shebang line locks the script into using a single version of Perl. While that might be what you want in some circumstances, I don't think that would be the norm.

This shebang line (which I indicated in "Re^3: Can't locate Email/MIME.pm in @INC" below) allows you to upgrade Perl and use it with all your scripts without having to edit every one of those scripts.

#!/usr/bin/env perl
[download]

It also makes it easy to test your current codebase with new versions of Perl: a single "perlbrew switch new-perl-version" to check for backward-compatibility and a single "perlbrew switch old-perl-version" to rollback (if that's required).

-- Ken

"installed perl5 using perlbrew and installed Email using clan as Ken had advised."

Did you use the "perlbrew switch ..." command shown in the App::perlbrew documentation I linked to in my earlier reply?

You'll see "perl -v" after most of those "perlbrew switch ..." commands: this will tell you the current version of Perl that you're using. As I mentioned earlier, "Apple includes its own customised version of Perl": the "perl -v" output will probably indicate the version has been patched if you're still using the System Perl. Here's what I get when running that for the current version (i.e. perl) and the System Perl (i.e. /usr/bin/perl):

$ perl -v

This is perl 5, version 18, subversion 1 (v5.18.1) built for darwin-th
+read-multi-2level
...
[download]

$ /usr/bin/perl -v

This is perl 5, version 12, subversion 3 (v5.12.3) built for darwin-th
+read-multi-2level
(with 2 registered patches, see perl -V for more detail)
...
[download]

"still getting the same error about @INC"

The "/Library/Perl/..." and "/System/Library/Perl/..." paths in @INC indicate the System Perl. If you are getting the same output, then you're still using the System Perl.

However, while that could indicate you haven't done "perlbrew switch ..." yet (or correctly), it's probably more likely to be related to your shebang line. [If you're still having problems (after all of this), advise us exactly how you're running your script: that may pinpoint the problem (if it still exists).]

I use the following shebang line for all of my Perl scripts:

#!/usr/bin/env perl
[download]

You can add options after that if you want (see perlrun). A common one you'll see in my posts is:

#!/usr/bin/env perl -l
[download]

"How do I make sure where is the version of perl what I just installed?"

"which perl" (from the command line) will tell you this. If it reports /usr/bin/perl, you're still using the System Perl: refer back to my earlier comments about "perlbrew switch ...".

Update: Tried notest install and force install - but the result is the same. Failure in installing perl. Back to the drawing board once again!