Help frens I am applying for low-cost veterinary services for disabled 🤞 and it has been a DAY so I'm emailing not calling 'cause my #spoonie self is wiped OUT My question: Is "Dear Sir, Ma'am, or Mx" appropriate to include differing gender identities? Or is there another preferred honorific?

It always strikes me as impersonal but my go to is "To whom it may concern"

Use the first name. Might as well go all in when using dear.