451 <boris.kham@guest.arnes.si>,<vincenc.petruna@guest.arnes.si>,<Miran.Tratnik@guest.arnes.si>,<Zorko.Vicar@guest.arnes.si>... timeout waiting for input during client greeting
550 <Zerdin.Matija@arnes.guest.si>... Host unknown (Name server: arnes.guest.si: host not found)