Case Study: Quantum Response Network achieves 95% more email sessions and 1350% faster transactional sends with Mailgun

Bringing Professionals Closer to Their Dream Job with Transactional Email

Quantum Response Network is a global online recruitment site with over one million active users across key markets that needed a reliable Email Service Provider to handle growing volume. Their legacy sending setup (three top-level domains with multiple subdomains) could not scale to support 1.2M+ daily emails or their 1.5M/day growth target, and the previous partner struggled with deliverability and capacity.

Working with Mailgun, they implemented dedicated IPs, balanced load with shared IP resources, and reorganized mail streams with dedicated technical support to improve visibility and deliverability. The changes enabled sustained high-volume sending (1.2M daily), a 95% increase in email-driven sessions, and a 1350% improvement in transactional sending speed—reducing a 29-hour send to under 2 hours.

Quantum Response Network

Graham Everitt

Director