$set = new ezcMailVariableSet($fullEmail);
$parsed = array_shift($parser->parseMail($set));
$parsed->to = array(new ezcMailAddress($mailing->replyto_email));
$set = new ezcMailVariableSet($fullEmail);
$parsed = array_shift($parser->parseMail($set));
$parsed->to = array(new ezcMailAddress($mailing->replyto_email));