Case Study: Inbox Marketer achieves scalable, high‑deliverability email and 30% reduced admin time with Message Systems' Momentum

Inbox Marketer - Customer Case Study

Inbox Marketer is a full-service digital marketing agency founded in 2002 that supports Fortune 500s and SMBs with email, web, social and mobile campaigns. As its email volumes grew to hundreds of thousands of messages daily, the company’s open-source MTA struggled to scale, lacked automated deliverability features, and forced staff to build and maintain custom macros and buy more licenses and servers.

Inbox Marketer replaced the legacy MTA with Message Systems’ Momentum platform and its Adaptive Delivery, gaining automated throttling, IP warm-up, real-time deliverability visibility, and high availability without additional hardware or licensing. The change cut email administration time by about 30%, improved deliverability and consistency, kept scaling costs in check, and freed the team to focus on onboarding clients and expanding channels like SMS and mobile push.

Inbox Marketer