Resources
What we learned from 10 million emails
Benchmarks, playbooks and deliverability guides written by the team that runs the platform.
Report · 12 min read
The 2026 B2B cold email benchmark report
Reply rates, sequence length and send-day data from 10M+ emails sent on Sendemail.
Read the reportMedian reply rate4.8%
Top-quartile reply rate11.2%
Best-performing sequence length4 steps
Best send windowTue–Thu, 8–10am local
Guide
How to warm up a new sending domain
A four-week ramp schedule that keeps a fresh domain out of the spam folder.
8 min readPlaybook
Writing a first line that doesn't sound automated
Six personalization angles that consistently outperform generic openers.
6 min readGuide
SPF, DKIM and DMARC explained for sales teams
What each record does, how to set it up, and how to read a failure.
10 min readCase study
Case study: Halcyon triples reply rate
How a 12-person sales team restructured sequences and lifted replies to 9.4%.
5 min readPlaybook
Building an outbound motion for agencies
Workspace structure, client reporting and deliverability hygiene at scale.
9 min readWant these applied to your funnel?
We'll review your sequences and deliverability setup on the demo call.