Fatal error line 595

[ssruprai]

Using latest version 7.3

For a certain message I'm getting error:

PHP Fatal error: Cannot use string offset as an array in ... bounce_driver.class.php on line 595

line 595: $stat = $ret['code'][0];

I think I can fix it temporarily for me using
if (!is_array($ret)) {
return $ret;
}

One thing which might be problematic could be the received 'for' address bounced emailed had. That certain Bounced email had address as

for [email protected]; Mon, 4 Nov 2013 14:00:24 -0500 (EST)
Content-Transfer-Encoding: quoted-printable