The publisher won a competitive pitch against a number of undisclosed agencies.
The newsletter will feature a mix of lifestyle and product-based features, hints and tips, along with interactive elements and prize draws. It will be distributed monthly to a database of RAC rescue and direct insurance members.
Seven Squared currently publishes RAC's customer magazine, RAC World, and the two publications will cross-promote each other.
The e-newsletter account was previously held by incumbent specialist digital agency glue London.