I am always a little concerned about approaching end users with a name. The act itself usually violates the conditions set out by ICANN etc. However, sending an email to the right someone asking a totally innocent question but having it come from someone @ KT.com is not...Let them see the address and make the approach themselves. I would also make sure I had an appropriate landing page set up as they will probably decide to investigate themselves.
Just my 2 cents as I haven't actually sold too many $$$,$$$.00 names.
This is a great name...G/L with sale
Jim