scrambled email

hello, my email is "boydster1@hotmail.com"

when i am trying to send myself a note to that email it populates the SEND TO with "ylqtvzkxxppghsjgr.swndrxvon@jtrua.onmicrosoft.com" instead of mailto:boydster1@hotmail

the mailto:ylqtvzkxxppghsjgr.swndrxvon@jtrua.onmicrosoft.com email comes up when i try to search for mailto:boydster1@hotmail.com but it is not listed as a contact for me to delete. Is there a way to clear or delete this from my account as a "suggestion"?