You can send Kaylee emails at kaylee.hirsbrunner@myldsmail.net She will get these letters every Thursday. Keep in mind that she only has about an hour of computer time in case you don't hear from her right away.
Another great way to write her is through a special service where a member delivers mail and packages to the MTC. You can send your letter through the site and it will be printed and
delivered the next day. She loves this because she can read paper letters anytime. The link for this service is https://www.missionarypackagemx.com/mtc-letters. You will need to provide her full name, District (5B) and mission (Maryland, Baltimore) for it to be delivered quickly. She will only be able to receive letters this way while she is in the MTC.