The documentation for IO::Socket::SSl says the default of SSL_VERIFY_NONE for option SSL_verify_mode is going to change. Well apparently that change occurred. And it seems I should be setting this option explicitly, or better yet, supply a certificate and path to be verified. However, I am not using IO::Socket::SSL directly, but it is embedded in Net::SMTP::SSL.

I see a bug 81594 was opened last November on Net::SMTP::SSL identifying the need to pass through options to IO::Socket::SSL.

It appears to me, all the solutions to sending e-mail via SSL pass through Net::SMTP::SSL affecting GoDaddy, Gmail, etc. It appears a few people are hacking either module to set the option, or like myself, I simply reloaded the 1.76 version of IO::Socket::SSL.