"Unsolicited queries" refers to inquiries or requests that are made without being requested or invited. They are usually unexpected and are not a result of prior communication or agreement. Full definition
If you've ever looked up the agent who represented your favorite author, chances are you found that said agent «does not accept unsolicited queries.» (lindacassidylewis.com)
While it is extremely competitive, Harper's does accept unsolicited submissions of fiction, as well as unsolicited queries. (aerogrammestudio.com)
Additionally, we can not guarantee a response to unsolicited queries. (filmcomment.com)