Enterprise HR buyers sit behind some of the strictest email filtering on the internet. Reaching them at volume means sending infrastructure credible enough to survive that scrutiny, and consistent enough to not flag as a new or suspicious sender. SuccessionHR needed all of that — and they needed to keep every one of their other sending streams unaffected while they pushed cold volume hard.

We built the outbound stack separately from their primary domains: dedicated subdomains warmed into enterprise inboxes over a structured ramp, IP reputation established across enterprise-grade security environments, and ongoing monitoring tuned to the filtering patterns that enterprise HR inboxes use. Cold outbound runs at scale; their transactional, marketing, and corporate sending stays untouched.