Filter messages in account by to, from, and/or subject

Filter account messages within the the to and from .address fields, and the subject line. This differs from /api/inbox-search by using logical AND, rather than OR in /api/inbox-search.

At least one query condition is required, otherwise a 400 will be returned.

A maximum of 100 results will ever be returned. Refine the query or reduce the number of messages in the account to find specific items.