Case Study: Mailgun achieves 600% revenue growth and improved email deliverability with Rackspace Technology

Increase Email Engagement With Mailgun Managed Email Service

Rackspace’s Mailgun combines Rackspace’s Fanatical Support with a developer-first email platform that has grown rapidly since acquisition—600% revenue growth in two years and an NPS of 71. As customers scaled (for example, Causes/Brigade sending 30M+ emails/month), they faced growing deliverability and false-SPAM risks that threatened reach and engagement.

Mailgun’s Managed Email service pairs customers with experts who build customized delivery plans, manage sender reputation, proactively monitor queues, and produce performance reports. After implementation and a new segmentation strategy, Brigade saw a 20% increase in click-through rate; across customers Mailgun drove higher click volume, more consistent traffic, better ROI, 24x7 integration support, and easier domain verification and log transparency.

Mailgun

Seth Weisfeld

Director of CRM and Acquisition Marketing