- 0.4
  -> make source address and domain random, so that one cannot analysis from 
  testing simply by refusing that domain and address (see article at 
  http://www.frbsd.org/fr/PoweredBy/smtpscan.html)
  -> improve much the speed of scan, thanks to Julien Perez's idea

- 0.3.1
  -> solve a problem with rbl informational message being incorrectly printed
  -> correct ambiguous statement about LICENSE in stmpscan code. License is
     now undoubtfully GNU GPL

- 0.3
  -> add information printing about remote server configuration (source
  checking ...) (suggested by "Nicob" <nicob@nicob.net>)
  -> improve database
  -> add LICENCE file
  -> add CONTRIBUTOR file
  -> add '-D' switch to allow to specify only a domain name, not a server 
     (suggested by "Fernando Cardoso" <fernando.cardoso@whatevernet.com>)
  -> add '-a' switch to scan every MXs for the specified domain (to be used
     with -D)
  -> add '-c' switch allowing not to create a new connexion for each test, using
     the RSET command (suggested by "Gwenael Letellier" <gwen@folleville.net>)
  -> add multi target support

- 0.2
  -> first public release