Free email warmup.
10 inboxes. That's it.
Connect up to 10 mailboxes and Chronic warms them automatically — real conversations, real engagement — so your cold emails land in the inbox, not the spam folder.
No credit card · Up to 10 mailboxes · Cancel anytime
Works with the mailboxes you already send from
A cold email in spam is worth nothing.
New domains and cold mailboxes have no reputation, so providers quietly route them to spam and promotions. You never see it — you just get no replies. Warmup builds the reputation that puts you back in the inbox.
inbox placement — the rest lands in spam & promotions
- Cold domain, zero sender reputation
- Spam-folder complaints climb
- Campaigns burn leads that never see you
inbox placement — measured on real IMAP truth
- Reputation built with human-paced engagement
- Spam-folder rate watched, ramp backs off automatically
- Every send counts against a safe daily ceiling
Three steps. Then it runs itself.
Connect your mailboxes
Add up to 10 mailboxes — Gmail, Outlook, Zoho, Migadu, or any IMAP/SMTP. Credentials are encrypted at rest, per tenant. Two minutes, no DNS changes.
We warm them, like real people
Chronic sends and replies to natural conversations across an aged seed network at a human pace, opens, and marks as important — building reputation the way providers actually reward.
You land in the inbox
We measure real placement — inbox vs spam vs promotions — via live IMAP inspection and provider signals, and correct course daily. You watch health climb.
Deliverability, done the honest way.
Most warmup tools game open-and-reply loops that providers ignore. Chronic measures where mail truly lands and defends it.
Grounded in provider truth
Health is scored on real IMAP placement plus Google Postmaster, Microsoft SNDS/JMRP and Yahoo signals — never our own synthetic activity.
No warmup fingerprint
Warmup mail shares envelope characteristics with real mail. No tell-tale headers, nothing on the wire that could hurt your sender reputation.
Placement, not vanity metrics
We track the number that matters — inbox vs spam vs promotions — and back off automatically the moment spam-folder rate creeps up.
A shared, safe send budget
Warmup never blows your daily ceiling. You always see what warmup consumed and what's left for real campaigns.
Automatic ramp
Volume scales up gradually and reacts to how each mailbox is actually landing — no manual schedules, no guesswork.
Multi-provider, multi-mailbox
One place for every mailbox across every provider. Scale reach by adding mailboxes, not by risking any single one.
Free. Actually free.
Ten mailboxes, warmed and defended, at no cost. No credit card, no trial clock.
Everything you need to land in the inbox.
- Up to 10 mailboxes
- Any provider — Gmail, Outlook, Zoho, IMAP/SMTP
- Automatic daily warmup & ramp
- Real inbox-placement tracking
- Spam-folder & complaint monitoring
- Health score grounded in provider truth
Need more than 10? Scale by adding mailboxes — talk to us.
Questions, answered.
Is it really free?
Yes. Up to 10 mailboxes warmed and monitored at no cost, no credit card, no trial countdown. If you outgrow 10 mailboxes, you can scale by adding more.
Will warmup touch my real emails or contacts?
No. Warmup is fully isolated. Its conversations never enter your CRM, never become leads or replies, and never affect your campaign analytics. It only builds and measures reputation.
Which providers do you support?
Gmail / Google Workspace, Outlook / Microsoft 365, Zoho, Migadu, MXroute, and any mailbox that speaks IMAP and SMTP.
How is this different from other warmup tools?
Most tools inflate opens and replies that providers ignore. Chronic scores health on real inbox placement plus provider reputation signals, and it never leaves a warmup fingerprint on the wire.
Is it safe for my sending reputation?
That's the whole point. Volume ramps gradually, spam-folder rate is watched continuously, warmup shares your safe daily ceiling with real campaigns, and it backs off automatically if placement dips.
How long until I see results?
Most mailboxes show a clear placement climb within the first two to three weeks, depending on domain age and starting reputation.
Warm up 10 inboxes. Free.
Connect your mailboxes in two minutes and start landing in the inbox.
No credit card required.