module Net
module Net::SMTPError
class Net::SMTP
class Net::SMTP::Address
class Net::SMTP::Response
class Net::SMTPAuthenticationError
class Net::SMTPFatalError
class Net::SMTPServerBusy
class Net::SMTPSyntaxError
class Net::SMTPUnknownError
class Net::SMTPUnsupportedCommand
net-smtp
0.3.3
# tls?
def tls? @tls end