class EventMachine::Protocols::SmtpServer

def process_vrfy

TODO - implement this properly, the implementation is a stub!

or 500 (Syntax error, command unrecognized) SHOULD be returned.
syntax given is valid. In that case, 502 (Command not implemented)
a server MUST NOT return 250 if all it has done is to verify that the
command unless it has actually verified the address. In particular,
A server MUST NOT return a 250 code in response to a VRFY or EXPN
RFC2821, 3.5.3 Meaning of VRFY or EXPN Success Response: 
def process_vrfy
  send_data "502 Command not implemented\r\n"
end