Cold Email Infrastructure, Built and Managed for You
We set up your sending domains, warmup, prospect lists, and sequences – then run it month to month so you focus on closing, not configuring.
Good outbound starts with the right cold email infrastructure
Most B2B teams have the offer and the product. What breaks down is the system behind it — the domains, the warmup, the data quality, the sequences. That’s what we build and run for you.
Sending Domain Setup
We purchase and configure your lookalike sending domains with SPF, DKIM, and DMARC — so your primary domain stays protected.
Email Warmup
Every inbox we provision goes through a structured warmup process before a single campaign email is sent. No shortcuts. No burned domains.
Prospect List Building
We build verified, ICP-matched lead lists using Apollo and Million Verifier — targeting the exact companies and titles your offer is built for.
Sequence Copywriting
We write 3–5 email sequences built around your ICP’s real pain points — short, personalized, specific, and structured to generate replies, not just opens.
Campaign Management
We launch, monitor, and optimise your campaigns weekly — tracking open rates, reply rates, bounce rates, and domain health so performance compounds over time.
Monthly Reporting
Every month you get a clear report: emails sent, open rate, reply rate, positive replies, and domain health scores. No vanity metrics — just the numbers that matter.
What’s inside every setup we build
- Google Workspace & Microsoft 365
Your sending inboxes. We use both providers deliberately — mixing Gmail and Outlook improves inbox placement across different email clients and reduces the risk of bulk filtering. - Smartlead
Where your campaigns live. Handles sending, warmup, reply tracking, and deliverability monitoring. We keep warmup running continuously — not just at the start. - Apollo.io
Where your prospect lists come from. We filter by industry, company size, job title, and geography to build lists that match your actual buyer — not just anyone with an email address. - Clay
What makes emails feel personal at scale. We enrich each contact with company data, recent activity, and relevant context so sequences don’t read like broadcasts. - Million Verifier
The step most businesses skip. Every list is verified before anything sends. Keeps bounce rates under 2% and protects your domain health long term.
Want to see how these work together? We walk through the full setup on every intro call.
Built by outbound practitioners
Sentinel’s Reach was built by cold email specialists who’ve managed sending infrastructure, deliverability optimisation, and outbound systems firsthand. We don’t subcontract or use cookie-cutter setups — every system is built from scratch for your ICP.