This document discusses internal partnership marketing at the UK's Health and Safety Executive (HSE). It describes how HSE develops email messages via partnerships with experts within the organization to more effectively reach stakeholders with relevant safety information. Two case studies are provided that show how partnership marketing for announcements about changes to injury reporting requirements and a trainee inspector campaign led to thousands of additional visits to HSE websites and helped meet recruitment goals. The conclusions emphasize that obtaining buy-in for partnerships is challenging but encourages seeing the "bigger picture" and that reporting results demonstrates the value of this approach over acting alone.