Case Study: Realtor.com achieves 99%+ email deliverability and improved engagement with SendGrid

Realtor.com optimizes email program with Expert Services

realtor.com, the leading online search destination for homebuyers, sellers, and renters, had relied on SendGrid’s delivery engine since 2011 but began seeing deliverability problems as its transactional email program grew. The marketing operations team discovered subuser accounts experiencing ISP blocks and high hard-bounce rates from invalid addresses, threatening critical email communications, so they engaged SendGrid’s Expert Services to investigate.

SendGrid’s experts analyzed account data and third-party analytics, identified two key risks (high hard bounces and a 10% block rate on an inactive lead-routing domain), and worked with ISPs to resolve them. The fixes lifted domain blocks (improving delivery from 0% to near 100%), cut bounce rates by about half for the top ten ESPs through list hygiene, resolved the routing-domain block, and helped realtor.com achieve over 99% deliverability—restoring confidence and improving engagement metrics.

Realtor.com

Jenna Chateauvert

Senior Director of Engagement Marketing