# determines whether or not encryption is used and which kind. For
# 'tls' the module 'Net::SMTP::TLS' is required; for 'ssl'
# 'Net::SMTP::TLS' is required and 'none' only uses 'Net::SMTP'.
# determines whether or not encryption is used and which kind. For
# 'tls' the module 'Net::SMTP::TLS' is required; for 'ssl'
# 'Net::SMTP::TLS' is required and 'none' only uses 'Net::SMTP'.