anchor.diff:        license = stdenv.lib.licenses.gpl2;
         maintainers = with maintainers; [ romildo ];
       };
  +  };
  +
  +  MailMessage = buildPerlPackage rec {
  +     name = "Mail-Message-3.006";
  +     src = fetchurl {
  +       url = mirror://cpan/authors/id/M/MA/MARKOV/Mail-Message-3.006.tar.gz;
  +       sha256 = "08bdf06bmxdqbslk3k9av542pjhyw9wx10j79fxz0dwpalimc6zi";
  +     };
  +     propagatedBuildInputs = [ IOStringy MIMETypes MailTools URI UserIdentity ];
  +     meta = {
  +       description = "Processing MIME messages";
  +       license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
  +     };
     };
   
     MailDKIM = buildPerlPackage rec {
  
positive.code:       license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
        maintainers = [ maintainers.rycee ];
      };
    };
  
    MathLibm = buildPerlPackage rec {
  
negative.code:     propagatedBuildInputs = [ URI ];
    };
  
    UserIdentity = buildPerlPackage rec {
       name = "User-Identity-0.99";
       src = fetchurl {
         url = mirror://cpan/authors/id/M/MA/MARKOV/User-Identity-0.99.tar.gz;
         sha256 = "0c2qwxgpqncm4ya3rb5zz2hgiwwf559j1b1a6llyarf9jy43hfzm";
       };
       meta = {
         description = "Collect information about a user";
         license = with stdenv.lib.licenses; [ artistic1 gpl1Plus ];
       };
    };
  
    URIIMAP = buildPerlPackage {
      name = "URI-imap-1.01";
      src = fetchurl {
  