Contactegration for The Raiser’s Edge integrates Constant Contact with The Raiser’s Edge to allow for better bulk email management. Contactegration allows you to export and update records directly from RE into Constant Contact for use in mass email marketing and gives you the ability to manage your campaign results, including bounces and unsubscribes. 

https://www.zeidman.info/wp-content/uploads/2015/03/Contactegration_Guide.pdf

Users will need to contact Zeidman support for assistance: https://www.zeidman.info