module Net
module Net::SMTPError
class Net::SMTP
class Net::SMTP::Address
class Net::SMTP::AuthCramMD5
class Net::SMTP::AuthLogin
class Net::SMTP::AuthPlain
class Net::SMTP::AuthXoauth2
class Net::SMTP::Authenticator
class Net::SMTP::Response
class Net::SMTPAuthenticationError
class Net::SMTPFatalError
class Net::SMTPServerBusy
class Net::SMTPSyntaxError
class Net::SMTPUnknownError
class Net::SMTPUnsupportedCommand
net-smtp
0.5.0
# message
def message @message || response.message end