Before you email a district list, send a seed test to a monitored inbox panel and read exactly where each copy lands. Here is how school vendors catch a spam-folder problem while it is still fixable.
One startup sent the same offer two ways: a 50,000-row blast and 1,200 verified, role-matched district contacts. The blast booked two demos and singed the domain. The targeted send booked 14. Here’s the full breakdown.