Andrea: > 2014/1/16 Wietse Venema <wie...@porcupine.org> > > > Andrea: > > > Anyone knows why this happens? > > > How can I force to have always 550 for inexistent domain on sender > > address? > > > > Postfix will ALWAYS reply 450 after TEMPORARY lookup error. > > Doing otherwise would be a mistake.
A lookup error means that there is no reply - the requestor does
not know whether the requested domain exists. This is not to
be confused with a reply that says the domain does not exist.
Wietse
