Thanks -- the suggestions helped get rid of the warning/error messages. However, there must be some other incompatibility since the code does not work as expected. I'll have to do what I was trying to avoid, viz., having to dig into the code to find out which pieces stop working in the new system. While doing this I'll also look to replacing the unmaintained CPAN modules with others such as NET::POP3_auth, Net::POP3::SSLWrapper, and NET::SMTP_auth.
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