A warm-up is only as good as the inboxes it warms with.
Your inbox earns its reputation inside a network of 10,000+ real inboxes across countries, providers, and inbox ages, with human reading behavior on every exchange. To Gmail and Microsoft, it looks like genuine correspondence, because it is built to be indistinguishable from it.
Empowering 1,000+ sales leaders and representatives to build a stronger sales pipeline.
10,000+ real inboxes, built to look like the real world
Providers are good at spotting warm-up circles: identical inboxes, one region, robotic hours. This network is deliberately shaped like a genuine book of business.
Warm-up that behaves like a human, not a bot
Providers do not score volume, they score behavior. Every warm-up email is read, replied to, and rescued the way a person would.
- Read emulation: warm-up emails are opened and interacted with at human speed, not bot-flashed in milliseconds.
- Replies and important-marks build the two strongest positive signals a mailbox provider records.
- Saved from spam: when a warm-up email lands in junk, the receiving inbox moves it out and marks it not-spam. That rescue is itself a reputation signal, and it is tracked as a number you can see.
Every inbox gets its own warm-up settings
Warm-up is not one global switch. Each connected inbox carries its own ramp, reply rate, schedule, and tag.
Start around 30 a day, step up 1 to 4 daily toward a cap you set, up to 200. Reputation is earned on a slope, not a cliff.
Dial the share of warm-up emails that get replies, up to 50%. Threads with responses are the strongest signal a provider sees.
Every inbox gets its own warm-up tag on every warm-up email, so they are spottable and filterable in one click, never mixed with real mail.
Warm a fresh secondary domain alongside your inbox, so it builds reputation before it ever carries a campaign.
Watch the reputation build, day by day
Under every connected inbox: warm-up sends, inbox vs spam placement, emails saved from spam, all by date. If warm-up deliverability reads 96%, that is what your campaigns can expect.
- Per-inbox deliverability % over the last days, not a one-time score.
- 24x7 domain monitoring: SPF, DKIM, and DMARC watched continuously in the Domain Health Center, because a warm inbox on a broken domain is still a broken domain.
- Campaign load tracked separately from warm-up volume, so you can see both halves of every inbox's day.
Don't burn your primary domain
Cold email volume belongs on secondary domains, so your company's main domain never carries the risk. We set that infrastructure up for you.
Secondary-domain inboxes, on demand
Sending domains and Google Workspace inboxes provisioned for you: thousands of new inboxes set up in under 24 hours, every one delivered with SPF, DKIM, and DMARC configured and domain health checked before it sends a single email.
Your primary domain stays clean
If a sending domain ever takes a reputation hit, you rotate it out and keep going. Your primary domain, the one your customers, deals, and inbound run on, never absorbs the risk of cold volume.
A warm-up circle vs a warm-up network
Comparing warm-up tools? Salesgear vs Instantly, vs Smartlead, or vs Lemlist.
Warm-up is the first layer of three
Reputation gets built here, protected on every send, and watched at the domain level.
Enforce the sending
Warm-up builds the reputation. Live validation, pacing, and bounce auto-pause protect it on every campaign send.
Deliverability optimizerWatch the domain
SPF, DKIM, DMARC, and MX scored with provider-specific fix guides for Gmail and Microsoft.
Domain Health CenterThen send with research
A warmed inbox gets you delivered. Research in every step earns the reply.
See sequencesEmail warm-up with Salesgear, answered
How does email warm-up actually work?
Your inbox exchanges emails with a network of 10,000+ real inboxes across countries, providers, and inbox ages. Those emails get opened, read at human speed, marked important, replied to, and rescued from spam when needed. To mailbox providers, your inbox looks like a person with genuine correspondence, because that is what the activity is.
How long until a new inbox is ready for campaigns?
The ramp starts low, around 30 warm-up emails a day, and increases by 1 to 4 per day up to a 200 cap you control. Most new inboxes are carrying meaningful campaign volume in 2 to 4 weeks. The per-day metrics show you exactly when deliverability is holding steady.
Does warm-up stop when my campaigns start?
No, and it should not. Warm-up runs alongside campaigns, and campaign volume is tracked separately from warm-up volume per inbox, so the system balances both. A steady base of genuine-looking correspondence keeps protecting your reputation while you sell.
Will anyone see my warm-up emails by accident?
Every inbox gets a unique warm-up tag included in all warm-up emails, so they are identifiable and filterable in a click. Your prospects are never in the warm-up network, and warm-up traffic never mixes with campaign sends.
Can I warm up a brand-new domain?
Yes. Custom-domain warming lets a fresh domain ride along with your connected inbox, building its reputation before it carries campaigns. Combine it with weekday-only sending and the low starting ramp, and a new domain earns trust the same way an old one did: slowly and consistently.
Which email providers does warm-up support?
Gmail, Google Workspace, and Office 365 connect natively, and any provider connects over SMTP and IMAP. Warm-up behavior and the per-day deliverability metrics work the same on every connected inbox.
Connect an inbox and watch it warm
Connect, set the ramp, and watch the per-day deliverability climb. Free account, no credit card.
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