Warming up
How it works
A warmup process that
matches how humans email.
Seven phases, all automated. From the moment OneMail connects a mailbox to the day Warmflow has it ready for your first campaign, here is exactly what Warmerly does.
Before phase one
Six checks stand between a new domain and a safe first send.
A mailbox is not ready because it exists. The domain has to be added, DNS has to resolve, the mailbox has to be provisioned, and SPF, DKIM and DMARC all have to line up before a single warmup message goes out.
Warmerly walks that sequence and blocks the next step until the previous one verifies, so nothing sends from a half-configured domain — the fastest way there is to burn a new one.
- 0160 seconds
Connect your mailbox
OAuth into Google Workspace, gmail.com, Microsoft 365, or Outlook.com through OneMail, our mailbox connection layer. We request only the scopes needed to send and receive warmup mail (gmail.modify or Mail.ReadWrite + Mail.Send). No password is ever entered, stored, or transmitted. You can disconnect at any time, which immediately revokes every token we hold.
- Google OAuth 2.0 with the minimum scope set
- Microsoft MSAL with Mail.ReadWrite + Mail.Send
- IMAP+SMTP for custom providers, encrypted with AES-256-GCM at rest
- Tokens stored encrypted and rotated automatically
- 02About 2 minutes
We profile your domain and existing reputation
Before sending anything, Warmerly reads your DNS to determine domain age, SPF chain, DKIM selectors, DMARC policy, and MTA-STS state. We probe the mailbox for prior send volume, IMAP folder structure, and existing spam-folder population. The output is a baseline health score and a recommended ramp curve tuned to your specific starting point.
- Domain WHOIS age and historical send-pattern signals
- Full DNS authentication audit, flagged misconfigurations
- Existing inbox classification snapshot
- Personalised ramp recommendation
- 0330 seconds
Pick a ramp schedule
Choose Conservative, Balanced, or Aggressive, or build your own. Conservative starts at 4 warmup sends per day and adds 2 per day, capping around 40. Balanced starts at 6 and adds 3, capping around 60. Aggressive starts at 10 and adds 5, capping around 100. You can change at any time and Warmerly auto-throttles back if your health score drops.
- Sensible defaults based on your domain age
- Weekend dampening on by default
- Auto-pause on reputation drop, with configurable floor
- Manual override any time, no support ticket needed
- 04Continuous
Peer pairing kicks in
Warmflow's pairing service decides who your mailbox should talk to today. Brand new mailboxes are matched mostly with aged, healthy peers. As your reputation grows, your mix shifts toward newer correspondents and cross-provider sends, which providers expect from a real sender. You never warm against your own mailboxes.
- Weighted by peer age, health, and provider mix
- Bad peers automatically removed from your graph
- Cross-provider blend tuned for the destination provider
- Peer graph re-balanced every 15 minutes
- 05All day, jittered
The send / reply / recover loop
Throughout your recipient's working day, with realistic jitter, Warmerly sends a small batch of warmup messages from your mailbox to its current peer set. Recipients open, mark important, star, reply with a contextual quoted-reply, and (critically) rescue from spam if the message landed there. Every action is performed by a real OAuth-connected mailbox, never simulated headers.
- Send latency jittered around recipient business hours
- Reply windows weighted to real-world response timings
- Spam scans every 10 minutes, recovery within the hour
- Star, label, and important markers used judiciously
- 06Every 24 hours
Daily authentication and placement checks
At a randomised time each day, Warmerly re-verifies SPF, DKIM, DMARC, MX, and TLS-RPT for every connected mailbox. InboxPulse also sends tracked seeds to a panel of provider accounts to measure inbox placement: Gmail primary, promotions, updates, social, or spam. The results feed back into your health score and reputation timeline.
- Auth checks log every failure with remediation copy
- Placement seeds across Gmail, Outlook, Yahoo, AOL, ProtonMail
- 30-day placement chart per mailbox
- Webhook on degradation, configurable threshold
- 07Whenever you are ready
You read the dashboard and ship campaigns
Once health is consistently above 80 with stable inbox placement, you are ready to run real outbound. Warmerly keeps warming in the background while your campaigns run, so reputation does not decay during quiet periods. If your campaign tool pushes a bounce or spam complaint, Warmerly auto-throttles warmup to protect the mailbox.
- Recommended green-light threshold: 80+ for 5 consecutive days
- Continuous warming during active campaigns
- Bounce-spike auto-pause
- Per-mailbox campaign send caps you control
What gets measured
Five signals make up your sending fingerprint.
Mailbox providers do not publish a score, but they behave as if they keep one. Authentication, engagement, bounce rate, volume stability and historic reputation are the five inputs that consistently move where your mail lands.
Every phase above exists to push one of those five in the right direction — and Warmerly tracks all five per mailbox, so a drop shows up as a specific cause rather than a vague dip in results.
Under the hood
The bits we obsess over so you do not have to.
Send-time jitter
We never send on round-number cadences. Each send time is drawn from a recipient-timezone-weighted distribution to look like organic activity.
Subject diversity
Warmup subject lines rotate from a 2,400-line tuned corpus, never reused on the same recipient within 30 days.
Quoted reply structure
Replies include the prior message body quoted with proper > prefixing and a contextual one-line reply above. That structure alone clears a surprising number of filter rules.
Provider-aware folder ops
Gmail labels and Outlook categories are applied with the correct API, not faked with IMAP flags.
TLS enforcement
Outbound warmup mail requires opportunistic TLS minimum, with MTA-STS honoured when present.
Token rotation
OAuth refresh tokens are rotated on every refresh and re-encrypted with a key derived per-environment.
Compounding
Reputation is a ledger, not a switch.
Each authenticated domain, each consistent sending day, each real reply and each bounce you avoid adds to a balance that carries forward. That is why warmup keeps running after your first campaign rather than stopping at “done”.
It is also why the damage from one bad list is not permanent — the same ledger that took the hit can be rebuilt, which is what spam recovery does.
From disconnected to deliverable in a week.
Most mailboxes hit a healthy 80+ health score within five to seven days of consistent warming.