def do_start(helodomain, user, secret, authtype)
raise IOError, 'SMTP session already started' if @started
check_auth_args user, secret, authtype if user or secret
sock = timeout(@open_timeout) { TCPSocket.open(@address, @port) }
@socket = Net::InternetMessageIO.new(sock)
@socket.read_timeout = 60
check_response(critical { recv_response() })
do_helo(helodomain)
if starttls
raise 'openssl library not installed' unless defined?(OpenSSL)
ssl = OpenSSL::SSL::SSLSocket.new(sock)
ssl.sync_close = true
ssl.connect
@socket = Net::InternetMessageIO.new(ssl)
@socket.read_timeout = 60
do_helo(helodomain)
end
authenticate user, secret, authtype if user
@started = true
ensure
unless @started
@socket.close if not @started and @socket and not @socket.closed?
@socket = nil
end
end