Modules to use for Secure Mail authentication using Activestate Perl 5.10 and IIS6

I'm needing to duplicate the functionality of an ActiveState 5.8 script that uses Net::SMTP::SSL to authenticate to my ISP's mail server -- only using perl 5.10.   It doesn't look like Net::SMTP::SSL is available for Perl 5.10 yet so, I was wondering if anyone was using a different combination of modules to perform secure authentication to send E-mail?  I'm only concerned about the secure authentication, at this point.  The messages themselves can be sent in cleartext.  I'd also like to be able to run the script as a CGI under IIS6.  TIAStart Free Trial