Best Practices for Running Scaled Cold Outbound Email Campaigns in B2B Settings

·Aug 12, 2026 08:46 AM·

hey all, curious how others running cold outbound at scale would poke holes in our process. here's roughly how we do it start to finish: buy domains → warm up (2+ weeks, sometimes longer) → placement test before putting them in rotation (we go by business-inbox placement since we're all B2B, newer domains land 100% in o365/workspace even when they spam-folder consumer gmail) lists: verified only, we drop catch-all and unverified before anything goes out sending: plain text, no links, ~15-30/inbox/day, slow ramp, spread across inboxes rather than pushing volume on any one monitoring: placement test + blocklist checks, swap out anything that goes bad running ~40 domains this way. what are we missing? anything you'd consider table stakes at this scale that we're not doing?

4 comments

· Sorted by Oldest

Saad A.
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Hey Sairamkumar, Solid setup honestly - most people running 40 domains are nowhere near this disciplined. A few things worth adding if you haven't already: Reply rate tracking per inbox not just per campaign - helps you spot which specific inboxes are degrading before placement tests catch it. Sometimes a domain looks fine on placement but the reply rates quietly drop first. Also worth rotating your sending patterns - same send times every day can become a fingerprint. Mixing up send windows across inboxes adds another layer of protection. And if you're not already doing it, a quick manual spot check on a few inboxes every week catches things automated monitoring misses - forwarded spam complaints, auto-unsubscribes landing weird, that kind of thing. If you still need any help, you can always text me!
Ozan D.
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one thing I'd add at 40 domains — segment by persona, not just rotate randomly. we noticed that certain ICPs respond way better from certain domain names (e.g. a .ai domain outperforms .com for technical buyers, but tanks for finance personas). also worth tracking bounce-to-reply ratio per domain, not just deliverability. a domain can land inbox perfectly but something about the sender name or domain just doesn't convert.
Sairamkumar S.
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Saad A. thanks for feedback mate
Sairamkumar S.
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Ozan D. i will track bounce-to-reply ratio per domain.. havet been checking that