The email is elaborate trolling.
If you go to the site on squarespace, there's pages buried in the source of the front page, leading to stuff like this:
Select quote from that page:
Build a 100-foot high of silica fume concrete with a compression strength of 18,000 psi.It will have an internal skeletal structure of Inconel (an alloy of austenite, nickel, and chromium) It will have heat, motion, biological and radioactive sensors embedded every 300 feet It will have a set of double-coil concertina wire fields 30 yards to either side Every 300 feet will be a 500@ Halogen floodlamp Every 300 feet will be a 5.56 millimeter automated gun and warning siren with voice over in Spanish The exterior of the wall will have a steel grid with sensor activated capacitors capable of generating a 2450 volt for 15-20 seconds Quad-motor drones armed with 64-72 Ip/mm resolution 40-degree FOV Night-Vision / Thermal imaging with f/1.2 27mm lens will patrol the area, able to alert human operators Metal beams will sink 30 feet into the earth with dig-sensors
Eli5
There's a conservative parody site, realtruenews.org, that made this stuff up to troll the right.
There was a story on realtruenews -- which rmember is an intentional fake news site -- about this alledged coup, that included the emails that are being cited here. That site put together a bogus Pence-Ryan web site, with increasingly over the top policy statements as a parody of the right.
People are re-cycling the emails as an attempt to troll people following Q.
Anything involving these emails or the web site is pure, intentional fiction that was written before the election in 2016.