From your link
“History[edit]
Fly Geyser is not an entirely natural phenomenon; it was accidentally created by well drilling[3] in 1964 exploring for sources of geothermal energy.[4] The well may not have been capped correctly, or left unplugged, but either way dissolved minerals started rising and accumulating, creating the travertine mound on which the geyser sits and continues growing.[4] Water is constantly released, reaching 5 feet (1.5 m) in the air.[1] The geyser contains several terraces discharging water into 30 to 40 pools over an area of 74 acres (30 ha).[5] The geyser is made up of a series of different minerals,[3] but its brilliant colors are due to thermophilic algae.[4]”
and
Other local geysers[edit]
A prior well-drilling attempt in 1917 resulted in the creation of a man-made geyser close to the currently active Fly Geyser; it created a pillar of calcium carbonate about 12 feet (3.7 m) tall, but ceased when the Fly Geyser began releasing water in 1964.[4]
Two additional geysers in the area were created in a similar way and continue to grow.[3] The first geyser is approximately 3 feet (0.91 m) and is shaped like a miniature volcano; the second is cone-shaped and is about 5 feet (1.5 m).[3]”
Looks like this e-mail is conflating to different geysers.
I did some checking and this looks like the only one.
Even Snopes says it is true. No mention of any others.
http://www.snopes.com/photos/natural/flygeyser.asp
More links here about it.
http://all-that-is-interesting.com/fly-geyser-nevada
https://www.youtube.com/watch?v=I8kLQehE5iI