--- title: Kumo Customers | Mike Hillyer description: Co-Founder of KumoMTA --- [Skip to content](https://kumomta.com/customers/author/mike-hillyer#main-content) [![KUMO\_Logo\_NEW\_Color](https://kumomta.com/hs-fs/hubfs/KUMO_Logo_NEW_Color.png?width=118&height=32&name=KUMO_Logo_NEW_Color.png "KUMO_Logo_NEW_Color")](https://kumomta.com) - Technology - [Architecture](https://kumomta.com/technology/architecture) - [Features](https://kumomta.com/technology) - [Open Source](https://kumomta.com/technology/open-source) - [Support & Pricing](https://kumomta.com/pricing) - About Kumo - [About Us](https://kumomta.com/about) - [Events](https://kumomta.com/events) - [Customers](https://kumomta.com/customers) - [Contact Us](https://kumomta.com/contact) - Resources - [Documentation](https://docs.kumomta.com/) - [Migration Center](https://kumomta.com/migration-center) - [Migration Center Hub](https://kumomta.com/migration-center) - [Momentum](https://kumomta.com/momentum-migration-guide) - [PowerMTA](https://kumomta.com/replace-powermta-with-kumomtas-infrastructure-built-for-mailops) - [Halon](https://kumomta.com/halon-migration-guide) - [SendGrid](https://kumomta.com/sendgrid-alternative-migration) - [Hurricane MTA](https://kumomta.com/hurricanemta-alternative-socketlabs-migration) - [Blog](https://kumomta.com/blog) - [Community Forum](https://community.kumomta.com/) - Guides & Reports - [2026 MTA Buyers Guide](https://kumomta.com/buyers-guide-2026-download) - [2026 State of MailOps](https://kumomta.com/2026-state-of-mailops-report-download-page) - [YouTube Channel](https://www.youtube.com/channel/UC348UpfbnPgpKPAXIBW_JNQ) - [Github Repository](https://github.com/KumoCorp/kumomta) - [Contact](https://kumomta.com/contact) # Customer Case Studies - Filter by: - [All](https://kumomta.com/customers/all) - [KumoMTA Case Study](https://kumomta.com/customers/tag/kumomta-case-study) [![](https://kumomta.com/hubfs/Lettermint%20Social%20Share%202.png)](https://kumomta.com/customers/lettermint-builds-sovereign-european-email-infrastructure-on-kumomta-and-scales-100x) [KumoMTA Case Study](https://kumomta.com/customers/tag/kumomta-case-study) - [Mike Hillyer](https://kumomta.com/customers/author/mike-hillyer) - July 20, 2026 ### [Lettermint builds sovereign European email infrastructure on KumoMTA and scales 100x](https://kumomta.com/customers/lettermint-builds-sovereign-european-email-infrastructure-on-kumomta-and-scales-100x) Facing a surge of European demand for transactional email that never touches US cloud infrastructure, Dutch provider... [Read more](https://kumomta.com/customers/lettermint-builds-sovereign-european-email-infrastructure-on-kumomta-and-scales-100x) [![](https://kumomta.com/hubfs/postmark_socialimage-2%20copy.jpg)](https://kumomta.com/customers/postmark) [KumoMTA Case Study](https://kumomta.com/customers/tag/kumomta-case-study) - [Mike Hillyer](https://kumomta.com/customers/author/mike-hillyer) - May 4, 2026 ### [Postmark cut transactional email delivery times by up to 40% with KumoMTA](https://kumomta.com/customers/postmark) By modernizing its MTA infrastructure and gaining real-time control over traffic shaping, Postmark improved resilience,... [Read more](https://kumomta.com/customers/postmark) [![](https://kumomta.com/hubfs/pure%20send_social%20image-2.jpg)](https://kumomta.com/customers/puresend) [KumoMTA Case Study](https://kumomta.com/customers/tag/kumomta-case-study) - [Mike Hillyer](https://kumomta.com/customers/author/mike-hillyer) - April 17, 2026 ### [Puresend reclaimed control of its email infrastructure in just two months](https://kumomta.com/customers/puresend) Facing industry consolidation and mounting instability, Puresend migrated from legacy MTAs to KumoMTA while maintaining... [Read more](https://kumomta.com/customers/puresend) [![](https://kumomta.com/hubfs/taguchi_social%20image-2.jpg)](https://kumomta.com/customers/taguchi) [KumoMTA Case Study](https://kumomta.com/customers/tag/kumomta-case-study) - [Mike Hillyer](https://kumomta.com/customers/author/mike-hillyer) - April 17, 2026 ### [Taguchi broke free from commercial MTA lock-in with open source](https://kumomta.com/customers/taguchi) After years of rising costs and shifting vendor priorities, Taguchi rebuilt its email foundation on KumoMTA to regain... [Read more](https://kumomta.com/customers/taguchi) [![](https://kumomta.com/hubfs/laposta_social%20image-1.jpg)](https://kumomta.com/customers/laposta) [KumoMTA Case Study](https://kumomta.com/customers/tag/kumomta-case-study) - [Mike Hillyer](https://kumomta.com/customers/author/mike-hillyer) - February 27, 2026 ### [Laposta achieved 3× faster throughput and 90% fewer IPs](https://kumomta.com/customers/laposta) Facing growing complexity and limited visibility, Laposta migrated from hundreds of Postfix instances to KumoMTA,... [Read more](https://kumomta.com/customers/laposta) [![](https://kumomta.com/hubfs/aweber_social%20image-2.jpg)](https://kumomta.com/customers/aweber) [KumoMTA Case Study](https://kumomta.com/customers/tag/kumomta-case-study) - [Mike Hillyer](https://kumomta.com/customers/author/mike-hillyer) - July 29, 2025 ### [AWeber achieved transparent, scalable email delivery and reclaimed control with KumoMTA](https://kumomta.com/customers/aweber) AWeber modernized its email infrastructure — gaining transparency, scalability, and full control with KumoMTA. [Read more](https://kumomta.com/customers/aweber) [![](https://kumomta.com/hubfs/aha%20send_social%20image-2.jpg)](https://kumomta.com/customers/aha-send) [KumoMTA Case Study](https://kumomta.com/customers/tag/kumomta-case-study) - [Mike Hillyer](https://kumomta.com/customers/author/mike-hillyer) - June 13, 2024 ### [AhaSend turned email infrastructure into a competitive advantage](https://kumomta.com/customers/aha-send) Frustrated by ESP limitations, AhaSend’s founders built their own email infrastructure on KumoMTA, turning a persistent... [Read more](https://kumomta.com/customers/aha-send) - Filter by: - [All](https://kumomta.com/customers/all) - [KumoMTA Case Study](https://kumomta.com/customers/tag/kumomta-case-study) [![](https://kumomta.com/hubfs/Lettermint%20Social%20Share%202.png)](https://kumomta.com/customers/lettermint-builds-sovereign-european-email-infrastructure-on-kumomta-and-scales-100x) [KumoMTA Case Study](https://kumomta.com/customers/tag/kumomta-case-study) - [Mike Hillyer](https://kumomta.com/customers/author/mike-hillyer) - July 20, 2026 ### [Lettermint builds sovereign European email infrastructure on KumoMTA and scales 100x](https://kumomta.com/customers/lettermint-builds-sovereign-european-email-infrastructure-on-kumomta-and-scales-100x) Facing a surge of European demand for transactional email that never touches US cloud infrastructure, Dutch provider... [Read more](https://kumomta.com/customers/lettermint-builds-sovereign-european-email-infrastructure-on-kumomta-and-scales-100x) [![](https://kumomta.com/hubfs/postmark_socialimage-2%20copy.jpg)](https://kumomta.com/customers/postmark) [KumoMTA Case Study](https://kumomta.com/customers/tag/kumomta-case-study) - [Mike Hillyer](https://kumomta.com/customers/author/mike-hillyer) - May 4, 2026 ### [Postmark cut transactional email delivery times by up to 40% with KumoMTA](https://kumomta.com/customers/postmark) By modernizing its MTA infrastructure and gaining real-time control over traffic shaping, Postmark improved resilience,... [Read more](https://kumomta.com/customers/postmark) [![](https://kumomta.com/hubfs/pure%20send_social%20image-2.jpg)](https://kumomta.com/customers/puresend) [KumoMTA Case Study](https://kumomta.com/customers/tag/kumomta-case-study) - [Mike Hillyer](https://kumomta.com/customers/author/mike-hillyer) - April 17, 2026 ### [Puresend reclaimed control of its email infrastructure in just two months](https://kumomta.com/customers/puresend) Facing industry consolidation and mounting instability, Puresend migrated from legacy MTAs to KumoMTA while maintaining... [Read more](https://kumomta.com/customers/puresend) [![](https://kumomta.com/hubfs/taguchi_social%20image-2.jpg)](https://kumomta.com/customers/taguchi) [KumoMTA Case Study](https://kumomta.com/customers/tag/kumomta-case-study) - [Mike Hillyer](https://kumomta.com/customers/author/mike-hillyer) - April 17, 2026 ### [Taguchi broke free from commercial MTA lock-in with open source](https://kumomta.com/customers/taguchi) After years of rising costs and shifting vendor priorities, Taguchi rebuilt its email foundation on KumoMTA to regain... [Read more](https://kumomta.com/customers/taguchi) [![](https://kumomta.com/hubfs/laposta_social%20image-1.jpg)](https://kumomta.com/customers/laposta) [KumoMTA Case Study](https://kumomta.com/customers/tag/kumomta-case-study) - [Mike Hillyer](https://kumomta.com/customers/author/mike-hillyer) - February 27, 2026 ### [Laposta achieved 3× faster throughput and 90% fewer IPs](https://kumomta.com/customers/laposta) Facing growing complexity and limited visibility, Laposta migrated from hundreds of Postfix instances to KumoMTA,... [Read more](https://kumomta.com/customers/laposta) [![](https://kumomta.com/hubfs/aweber_social%20image-2.jpg)](https://kumomta.com/customers/aweber) [KumoMTA Case Study](https://kumomta.com/customers/tag/kumomta-case-study) - [Mike Hillyer](https://kumomta.com/customers/author/mike-hillyer) - July 29, 2025 ### [AWeber achieved transparent, scalable email delivery and reclaimed control with KumoMTA](https://kumomta.com/customers/aweber) AWeber modernized its email infrastructure — gaining transparency, scalability, and full control with KumoMTA. [Read more](https://kumomta.com/customers/aweber) [![](https://kumomta.com/hubfs/aha%20send_social%20image-2.jpg)](https://kumomta.com/customers/aha-send) [KumoMTA Case Study](https://kumomta.com/customers/tag/kumomta-case-study) - [Mike Hillyer](https://kumomta.com/customers/author/mike-hillyer) - June 13, 2024 ### [AhaSend turned email infrastructure into a competitive advantage](https://kumomta.com/customers/aha-send) Frustrated by ESP limitations, AhaSend’s founders built their own email infrastructure on KumoMTA, turning a persistent... [Read more](https://kumomta.com/customers/aha-send) [![KUMO\_Logo\_Files\_Color 1](https://kumomta.com/hubfs/KUMO_Logo_Files_Color%201.svg "KUMO_Logo_Files_Color 1")](https://kumomta.com) ##### Proud member of ![maawg 1](https://kumomta.com/hubfs/maawg%201.png "maawg 1") [Follow us on LinkedIn](https://www.linkedin.com/company/91414337/) [Follow us on Github](https://github.com/KumoCorp/kumomta) [Follow us on Discord](https://discord.com/servers/kumomta-1072980126737907824) [Follow us on Youtube](https://www.youtube.com/channel/UC348UpfbnPgpKPAXIBW_JNQ) ##### Explore KumoMTA - [Open Source](https://kumomta.com/technology/open-source) - [Features](https://kumomta.com/technology) - [Pricing](https://kumomta.com/pricing) - [Case Studies](https://kumomta.com/customers) - [About Us](https://kumomta.com/about) - [Privacy](https://kumomta.com/privacy) ##### Resources - [Blog](https://kumomta.com/blog) - [Documentation](https://docs.kumomta.com/) - [Community Forum](https://community.kumomta.com/?_gl=1*o6wdcs*_gcl_au*MTAxMDA2MjM0NC4xNzcyNzI4Njg3*_ga*MTQ0NjAzODcyNS4xNzU3MDkzMjQ2*_ga_LNBCW1KF8J*czE3Nzc5MzU3ODYkbzIkZzAkdDE3Nzc5MzYwMjMkajI3JGwwJGgw) - [FAQ](https://docs.kumomta.com/faq/) - [YouTube Channel](https://www.youtube.com/channel/UC348UpfbnPgpKPAXIBW_JNQ) - [GitHub Repository](https://github.com/KumoCorp/kumomta?_gl=1*12d5gs8*_gcl_au*MTAxMDA2MjM0NC4xNzcyNzI4Njg3*_ga*MTQ0NjAzODcyNS4xNzU3MDkzMjQ2*_ga_LNBCW1KF8J*czE3Nzc5MzU3ODYkbzIkZzAkdDE3Nzc5MzU3ODkkajU3JGwwJGgw) - [© 2026 Kumo Corp, All rights reserved. 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