Cold email infrastructure, set up so it lands in the inbox
Tentt sets up cold email infrastructure for B2B companies: separate sending domains and inboxes, SPF, DKIM and DMARC, warm-up, list verification, and sequences in Smartlead, Instantly or lemlist, connected to your CRM so replies are never lost. It is built in 30 days as a One-System Build or as part of a full 90-day GTM system.
What does Tentt set up?
Sending domains and inboxes
Secondary domains that protect your main domain, with inboxes sized so each one stays within a safe daily volume.
Authentication
SPF, DKIM and DMARC records set up and checked, which Gmail and Yahoo require for bulk senders.
Warm-up and rotation
Inboxes warmed before they send, with campaigns rotated across inboxes inside your sequencer.
Verification before sending
Every list verified, with catch-all addresses handled separately, so bounce rates stay low and your domains keep their reputation.
Sequences and reply handling
Campaigns built in Smartlead, Instantly or lemlist, with replies and outcomes written back to HubSpot or Attio.
Which tools does it use?
Smartlead, Instantly or lemlist?
All three handle inbox rotation and warm-up. Smartlead and Instantly suit email-only volume across many inboxes; lemlist suits teams that want LinkedIn steps in the same sequence. We compare them on price and limits in our Instantly vs Smartlead and lemlist vs Instantly comparisons, and pick in the consultation based on how you sell.
How does a Tentt build work?
- 1Consultation and analysisWe map how you sell today: your funnel, tools, data, and where automation and signals can move the needle.
- 2Pick and design the systemWe agree what the system should do, which tools it uses and how data flows between them, before anything is built.
- 3Build it into your stackWe build and connect it inside your own accounts, so nothing lives in a black box you cannot see.
- 4Enablement and handoffWe train your team with live sessions and recorded videos, and document the system so you can run it in-house, or we run it for you.
What do you get at the end?
- Domains, inboxes and DNS records configured
- Warm-up running before the first campaign
- Verification step in front of every list
- Sequencer set up and connected to your CRM
- Monitoring checklist and recorded training
Builds run as the 30-day One-System Build or as part of the 90-Day GTM Sprint, both for a one-time fee.
Questions about this service
Who can set up cold email infrastructure for me?
A GTM engineering agency or a deliverability specialist. Tentt sets up domains, inboxes, authentication, warm-up, verification and sequences as one system, connected to your CRM, in 30 days.
Why use separate domains for cold email?
So that if a sending domain is flagged as spam, your main domain and day-to-day email are unaffected. Tentt sets these up as part of every cold email build.
Which sequencer do you set up?
Smartlead, Instantly or lemlist, depending on your volume, budget and whether you need LinkedIn steps. Tentt picks one with you in the consultation.
How long does setup take?
Infrastructure needs warm-up time before it sends at volume, so Tentt builds it as a 30-day One-System Build, or as one part of a 90-day Sprint.
Can you run the campaigns too?
Yes. Tentt can hand the system to your team with training and documentation, or run it on a retainer.
Learn how it works
- Cold email deliverability in 2026: domains, authentication, warm-up and monitoringCold email deliverability in 2026: SPF, DKIM and DMARC, Gmail, Yahoo and Outlook sender rules, spam rates under 0.3%, warm-up, inbox volume and monitoring.
- Signal-based outbound: how to find, capture and act on buying signalsSignal based outbound explained: the main intent signals, how to capture job changes, hiring, funding and web visits, and how to turn each into a message.
Want cold email set up properly?
Book a call. We'll look at how you sell and, if it's a fit, scope the build.
Book a GTM strategy call