[comp.mail.sendmail] non-intuitive error message

les@chinet.chi.il.us (Leslie Mikesell) (08/30/90)

Does this make any sense?

<<< 550 <comp-dcom-telecom@gargoyle>... User unknown: Address already in use
550 gargoyle!comp-dcom-telecom... User unknown

Les Mikesell
  les@chinet.chi.il.us