Several agents use they/them pronouns, so I don't want to offend anyone by putting Mr. or Ms. Is it okay to use the agent's first name in the salutation?
It's also ok to use both first name and surname.
Dear Janet, or
Dear Janet Reid, or even
What is going by the wayside I fear is one of my former reliable work around:
Ladies and Gentlemen:
And if this is all just too much for you and you're tempted to forgo the salutation entirely, do NOT do that.
(at least not for me)
Including my name on a query is one of the very few requests I make for sending me work.
(me/me/meeeee!) <----too soon?