No sending history = no trust
ESPs have never seen mail from your domain. Without a track record, every message is suspicious and gets throttled by default.
Email Warmup
New inbox? Cold domain?
Warm it up before you send.
ESPs throttle new senders. Our warmup network sends real conversations from real inboxes to build your sender reputation gradually. Go from cold to inbox-ready in 30 days.
Sender Reputation72/100
Cold
Warming
Warm
Hot
30-day ramp · Real conversations · All major ESPs
Why new domains fail
Why cold domains get blocked.
Sudden volume spike = spam flag
Going from zero to thousands overnight is the biggest red flag for spam filters. ESPs interpret volume spikes as bot behavior.
No engagement = reputation tank
If early emails get ignored or marked as spam, your reputation drops before it ever had a chance. First days define your trajectory.
Week by week
From 5 emails a day to 150. Here is the ramp.
01
Week 1: Foundation
5-15/day sent3-10/day replied
Low volume, high reply rate. ESPs begin registering your domain as a real sender.
02
Week 2: Building momentum
15-40/day sent10-25/day replied
Volume doubles gradually. Reply threads deepen. Gmail starts moving you out of Promotions.
03
Week 3: Earning trust
40-80/day sent25-50/day replied
ESP algorithms begin treating your domain as established. Inbox placement improves noticeably.
04
Week 4: Inbox ready
80-150/day sent50-90/day replied
Sender reputation is solid. You can begin real campaigns at moderate volume.
No password sharing · OAuth only · Warmup pauses if issues detected
Set it up once
Connect. We handle the rest. You watch the score climb.
01
Connect your inbox
Link Gmail, Outlook, or any SMTP provider via OAuth. Takes 30 seconds. We never see or store your password.
02
We send and reply
Our network of real mailboxes exchanges genuine-looking conversations with your account. Volume ramps gradually.
03
Reputation climbs
ESPs see real engagement — opens, replies, threads. Your sender score improves day by day until you are inbox-ready.
Not all inboxes are equal
Gmail cares about engagement. Outlook cares about complaints. Yahoo wants registration.
01
Gmail
Weighs engagement heavily. New senders start in Promotions and must earn Primary through consistent opens, replies, and stars.
02
Outlook
Relies on SmartScreen and reputation databases. Penalizes high complaint rates aggressively. Clean history gets priority placement.
03
Yahoo
Proprietary reputation tied to complaint feedback loops. Senders without Yahoo CFL registration get throttled. Consistency matters.
04
Apple Mail
Privacy-focused — Mail Privacy Protection hides opens. Relies on server-side filtering and domain authentication over engagement.
Mistakes that reset your progress
Four things that will undo weeks of warmup overnight.
Sending real campaigns during warmup
Mixing promotional emails with warmup traffic confuses ESP algorithms. Keep warmup isolated until reputation stabilizes above 80.
Skipping authentication setup
SPF, DKIM, and DMARC must be configured before warmup begins. Without them, even perfect warmup behavior gets flagged.
Warming up a blacklisted domain
Warmup will not fix an existing blacklist. Delist first, then warm up. Sending from a blacklisted domain burns reputation further.
Stopping warmup too early
ESPs need 30 days of consistent positive signals. Cutting short means your reputation resets the moment you increase volume.
Cold domains don't land in inboxes.
Start warming up today. See reputation
improvements within the first week.
1 inbox included free · Add more for $3/mo · Cancel anytime