Free warmup for every mailbox. Forever.
Every mailbox you connect joins the free warmup network: mailboxes exchange ordinary emails, open them, reply, and move them out of spam, building your sender reputation day by day.
Mailbox health
atique@usarion.co
Healthy
98% inbox
hello@usarion.co
Healthy
95% inbox
daniel@getusarion.com
Healthy
89% inbox
priya@getusarion.com
Slowed by AI
72% inbox
team@usarion.studio
Warming (day 4 of 21)
Warming
What it does
Unlimited mailboxes
Warm up as many mailboxes as you own. There’s no warmup plan to buy.
Health score
A 0–100 score per mailbox: the share of its warmup emails that landed in the inbox over 14 days.
Gradual ramp-up
Starts at 2 warmup emails a day and adds 2 a day up to 40 by default. You can set the ceiling (5–80), ramp (1–10) and reply rate (10–60%).
Clean network
Mailboxes paused for high bounces leave the warmup network automatically.
Runs alongside campaigns
Warmup keeps going while you send, which keeps reputation steady.
Hidden from your inbox
Warmup emails never appear in the team inbox.
How it works in Inboxed
Connect a mailbox
Warmup starts on its own.
Volume climbs
By about week two a mailbox sends around 26 warmup emails a day.
Score appears
Once there’s enough placement data, the health score shows where its emails land.
Launch when ready
Most new mailboxes warm up for two to four weeks before campaigns.
Try it free
No account needed. The same checks run inside Inboxed for every workspace.
Honest limits
What this doesn’t do, and what it needs from you.
- Warmup builds reputation slowly; it can’t undo a blocklisting or make a bought list safe.
- The health score reflects warmup emails inside the network, not every inbox your leads use. Use placement tests for that.
Questions
How much does warmup cost?
Nothing, for every mailbox you connect, with no limit on mailboxes.
Why is it free?
Warmup works better the more mailboxes take part. We make money when you send campaigns.
How long should I warm up?
Two to four weeks for a new mailbox, then keep warmup running at a low level.
Works with the rest of Inboxed
- Deliverability suitePlacement tests with Gmail tabs, DMARC reports, Postmaster spam rate, blocklist and DNS checks.
- Unlimited mailboxesConnect as many mailboxes as you like and rotate sending across them safely.
- Email verifierFree, unlimited verification of every lead before it’s sent, and a free public checker.
Warm up today. Launch when you’re ready. Pay only for emails that send.
No subscription, no card to start. Connect a mailbox and warmup begins in under a minute.