Number 1: 
Sendscape
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Email & notification APIs · Slovakia
Warmup Inbox
Email warmup service that improves deliverability and sender reputation
- Community votes
- 0
- DR by Ahrefs
- 62 +1 (up) since last check
Ahrefs Domain Rating benchmarked 6 Nov 2026, rebuilt 5 Nov 2026.
Warmup Inbox helps cold email senders improve deliverability by syncing their inboxes to a network of 30,000+ real inboxes that interact with and protect emails
What it is
Warmup Inbox is an email warmup service designed for cold email senders, sales teams, marketers, recruiters, and outreach specialists. The platform syncs your inbox to a network of 30,000+ real inboxes that engage with your emails by replying, marking them as important, and removing them from spam folders. This interaction restores sender reputation and trains mail servers to view emails as legitimate. The service continuously monitors email health across multiple metrics including spam folder placement, DNS configuration, DMARC, DKIM, SPF, domain age, and blacklist status, providing reports and recommendations to maintain high deliverability. It supports all major email providers including Gmail, Outlook, Yahoo, iCloud, and others. Users can start with a 7-day free trial requiring no credit card.
What it is built with
- Sync inbox to network of 30,000+ real inboxes
- Automated interactions: replies, marking as important, removing from spam
- Email health monitoring and reports
- Spam filter monitoring
- Email reputation check
- Outreach sequences
- Custom warm up settings (Pro plan)
- Scheduled warm up (Pro plan)
Pricing
Pricing model: Freemium
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Warmup Inbox metrics
| Metric | Value |
|---|---|
| Domain Rating | 62 +1 (up) since last check |
| Trust Flow | 29 no change since last check |
| Citation Flow | 46 no change since last check |
| Referring domains | 1,824 no change since last check |
| External backlinks | 4,938 no change since last check |
Ahrefs Domain Rating benchmarked 6 Nov 2026, rebuilt 5 Nov 2026. Main build topic: Computers/Internet/Web Design and Development (29). Majestic benchmarked 11 Oct 2026, rebuilt 11 Oct 2026. Link data built by Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.
Warmup Inbox domain build sheet
Open the build sheet
| Domain age | 6 years |
|---|---|
| Registered | |
| Expires | |
| Registrar | NameCheap, Inc. |
| DNSSEC | Signed |
Warmup Inbox after-launch build log
Since Warmup Inbox launched on Maker Launches on 11 October 2026, these are the figures we have tracked.
- Domain Rating (Ahrefs)
- 62 no change since launch
- 62 at launch (11 Oct 2026), 62 on 6 Nov 2026
- Trust Flow (Majestic)
- 29
- First measured 11 Oct 2026
- Referring domains (Majestic)
- 1,824
- First measured 11 Oct 2026
Day 26 since launch. Next receipt: day 30, 10 Nov 2026. We show what changed, not what caused it: many things affect these numbers. Nothing here is estimated.
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Questions from the bench
- What does it mean to warm up an inbox?
- Email warmup is the process of preparing a new or long-inactive email account for future email outreach and campaigns. It is especially useful for cold email inboxes, which usually suffer from lower deliverability rates.
- Why do I need to warm up my inbox?
- Over time, cold email inboxes inevitably suffer from deliverability issues. A well-administered email warmup reverses this process and helps you maintain and improve your deliverability and sender reputation.
- How does Warmup Inbox work?
- You connect your inbox to the platform and the service interacts with it by replying to emails, marking them as important, and removing them from spam folders. The platform continuously monitors your email health across multiple metrics including DNS settings, DMARC, DKIM, SPF, domain age, and blacklist status.
- How many inboxes are in the network?
- The network has 30,000+ real inboxes, so everyone who syncs a new email address to the platform has enough reputable inboxes to interact with for the lifetime of their subscription.
- What is the pricing?
- Plans start at $19 per inbox per month for monthly billing, or $15 per inbox per month for annual billing. A 7-day free trial is available with no credit card required.
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Warmup Inbox has a free listing. The owner can unlock the full profile with a paid launch for $5:
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- Milestones (locked)
- Demo video (locked)
- Dofollow website link (locked)
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