mxcheck ( <TRUE>|<FALSE> )
   Specifies whether addresses passed to address() should
   be checked for a valid DNS entry.  The default is
   false.

##</code><code>##

  If an error is encountered, an exception is raised.  This
  is really only possible when performing DNS queries.  Trap
  any exceptions by wrapping the call in an eval block:

  eval {
       $addr = Email::Valid->address( -address => 'maurice@hevanet.com',
                                     -mxcheck => 1 );
       };
       warn "an error was encountered: $@" if $@;