Googled around and i cant get an SSL test using IO::Socket:SSL to work. Can someone point me in the right direction to set up SSL validation against a server running https. 
use IO::Socket::SSL qw(debug4);
use Data::Dumper;


    # simple HTTP client ---------------------------------------------
+--
    my $sock = IO::Socket::SSL->new(
        # where to connect
        PeerHost => "mail.google.com",
        PeerPort => "443",
        SSL_verify_mode => SSL_VERIFY_PEER,
        SSL_ca_path => 'C:\\Users\\Simon\\ptest\\certs'
    ) or die "failed connect or ssl handshake: $!,$SSL_ERROR";

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And getting:- 
C:\Users\Simon\ptest>t2.pl
DEBUG: .../IO/Socket/SSL.pm:1805: new ctx 46151184
DEBUG: .../IO/Socket/SSL.pm:449: socket not yet connected
DEBUG: .../IO/Socket/SSL.pm:451: socket connected
DEBUG: .../IO/Socket/SSL.pm:469: ssl handshake not started
DEBUG: .../IO/Socket/SSL.pm:504: using SNI with hostname mail.google.c
+om
DEBUG: .../IO/Socket/SSL.pm:540: Net::SSLeay::connect -> -1
DEBUG: .../IO/Socket/SSL.pm:1411: SSL connect attempt failed with unkn
+own error

DEBUG: .../IO/Socket/SSL.pm:546: fatal SSL error: SSL connect attempt 
+failed with unknown error error:14090086:SSL routines:SSL3_GET_SERVER
+_
CERTIFICATE:certificate verify failed
DEBUG: .../IO/Socket/SSL.pm:449: socket not yet connected
DEBUG: .../IO/Socket/SSL.pm:451: socket connected
DEBUG: .../IO/Socket/SSL.pm:469: ssl handshake not started
DEBUG: .../IO/Socket/SSL.pm:507: not using SNI because hostname is unk
+nown
DEBUG: .../IO/Socket/SSL.pm:540: Net::SSLeay::connect -> -1
DEBUG: .../IO/Socket/SSL.pm:1411: SSL connect attempt failed with unkn
+own error

DEBUG: .../IO/Socket/SSL.pm:546: fatal SSL error: SSL connect attempt 
+failed with unknown error error:14090086:SSL routines:SSL3_GET_SERVER
+_
CERTIFICATE:certificate verify failed
DEBUG: .../IO/Socket/SSL.pm:1842: free ctx 46151184 open=46151184
DEBUG: .../IO/Socket/SSL.pm:1850: OK free ctx 46151184
failed connect or ssl handshake: Bad file descriptor,IO::Socket::IP co
+nfiguration failed SSL connect attempt failed with unknown error erro
+r
:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify 
+failed at C:\Users\Simon\ptest\t2.pl line 6.

[download]

As i am testing against google mail - i downloaded all 3 certs in the key chain and put them in the certs dir. mail.google.com.crt GoogleInternetAuthorityG2.crt GeoTrustGlobalCA.crt Any ideas as to what im doing wrong.

In reply to Guidance on SSL Cert Checking by setuk1

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