anchor.diff:              ln -sf ${pkgs.postfix}/share/postfix/conf/* /var/postfix/conf
   
               ln -sf ${aliasesFile} /var/postfix/conf/aliases
  +            ln -sf ${virtualFile} /var/postfix/conf/virtual
               ln -sf ${mainCfFile} /var/postfix/conf/main.cf
   
               ${pkgs.postfix}/sbin/postalias -c /var/postfix/conf /var/postfix/conf/aliases
  +            ${pkgs.postfix}/sbin/postmap -c /var/postfix/conf /var/postfix/conf/virtual
   
               exec ${pkgs.postfix}/sbin/postfix -c /var/postfix/conf start
             ''; # */
  
positive.code:         example = "+";
          description = "
            Delimiter for address extension: so mail to user+test can be handled by ~user/.forward+test
          ";
        };
  
  
negative.code: 
        recipientDelimiter = ${cfg.recipientDelimiter}
      ''
      + optionalString (cfg.virtual != "") ''
        virtual_alias_maps = hash:/etc/postfix/virtual
      ''
      + cfg.extraConfig;
  
    aliases =
  