How Postmastery helped Lettermint scale European Email Infrastructure

As Lettermint grew from a small transactional email platform into a broader European email service provider, operational visibility and deliverability management became increasingly important.

To support its growth, Lettermint selected KumoMTA for email delivery and Postmastery Console for analytics, monitoring, and reputation management. The combination enabled the team to automate bounce handling, reduce manual log analysis, and gain deeper insight into delivery performance across customers and domains.

Today, Lettermint operates a scalable, privacy-first email platform hosted entirely within the European Union, serving customers ranging from e-commerce businesses to public sector organizations.

Read the full customer story to learn how Lettermint uses KumoMTA and Postmastery Console to improve deliverability, streamline operations, and support continued growth.