I "think" I can change the DNS to look at internal DNS, change the name of the domain on the scanner to the internal domain, and then create an mx record that points to my internal server that is ...

I am not sure if I would have better luck here or at OPNSense forum, so I thought I'd try here first. IPv6 is a curiosity, and also it used to work out of the box when I was on a crappy Mikrotik ...

Tom Daly, chief technology officer at Dyn, a New Hampshire-based DNS company that services Twitter, said somebody using a "set of valid Twitter credentials" redirected the site.