Land in the Inbox.
Connect Google Postmaster and MS SNDS. Run placement tests. Warm up domains automatically. Stop guessing why your emails go to spam.
Universal Provider Support.
InboxPin seamlessly integrates with every major mailbox provider. Our live sync technology monitors your reputation across the entire ecosystem.
Google Workspace
Yahoo! Mail
Zoho Mail
Microsoft 365
Outlook
Custom SMTP
Built for every email strategy.
Whether you are scaling cold outreach, sending a weekly newsletter, or delivering critical transactional receipts, InboxPin ensures you hit the primary inbox.
Stop landing in the spam folder.
Cold outreach only works if they see your email. Our automated warmup engine builds pristine reputation for your domains so your pitches land directly in the Primary Inbox, increasing open rates and booking more meetings.
"As a cold email expert, I always recommend using InboxPin to maximize the reputation of an email address. InboxPin combines complex algorithms and email best practices to offer a very efficient deliverability solution."
"We've tested many solutions and InboxPin is definitely the most efficient email deliverability tool. It helped us rescue our weekly newsletter from the Promotions tab for over 50,000 subscribers."
Escape the Promotions tab.
You spend hours writing your newsletter, only for it to be buried in the Promotions or Updates folder. Our Seed Testing tool analyzes your subject lines and authentication to guarantee you land right where your readers are looking: the Primary tab.
Build sender reputation on autopilot.
Warming up a new domain or dedicated IP manually is a nightmare. Our warmup engine automatically sends, opens, clicks, and replies to emails across a network of real inboxes to build your sender reputation perfectly.
Warmup Progress
yourcompany.com
"Before InboxPin, warming up new IPs took weeks of manual labor and spreadsheets. Now, we plug in our domains and the autopilot handles everything flawlessly. Our open rates have never been higher."
Live Data Sync
Integrate directly with Google Postmaster and Microsoft SNDS to see your exact reputation in real-time.
Google Postmaster
Live Sync Active
Microsoft SNDS
Live Sync Active
Seed Test Results
ID: #994215% landed in Promotions
Know exactly where your emails land.
Automated Inbox Placements continuously test your emails against our global network of seed accounts before you hit send to your real list. We automatically check every seed inbox and report back whether your email landed in the Inbox, Promotions, or Spam folder.
- Test against 50+ major mailbox providers.
- Identify subject lines triggering spam filters.
- Track inbox placement rates over time.
- Pinpoint exactly which ISP is blocking you.
The complete deliverability toolkit
Stop relying on guesswork. InboxPin brings together ISP data, real-world seed testing, and automated warmups into one unified platform.
Google Postmaster Integration
Automatically sync your Google Postmaster data. Track your Domain Reputation, IP Reputation, Spam Rate, and Authentication loops in one dashboard without manually checking Google.
- Domain & IP Reputation tracking
- User-reported spam rates
- Authentication success rates
- Delivery error diagnostics
Microsoft SNDS Sync
Direct integration with Microsoft Smart Network Data Services. Get alerted the moment Microsoft flags your IPs or filters your traffic into the Junk folder.
- IP filter status monitoring
- Complaint rate tracking
- Spam trap hits detection
- Automated SNDS data ingestion
Inbox Placement Tests
Stop guessing if you're landing in spam. Send test emails to our global seed list and see exactly where your emails land across Gmail and Outlook.
- Multi-provider seed testing
- Inbox vs Spam vs Promotions
- Subject line & content analysis
- Historical placement trends
Automated Domain Warmup
Launch new domains and IPs safely. Our automated warmup engine gradually increases volume while generating positive engagements to build a pristine sender reputation.
- Algorithmic volume scaling
- Peer-to-peer engagement
- ISP-specific throttling
- Auto-pause on reputation dips
Monitor. Deliver. Protect.
Stop deliverability issues before they impact your business. Get continuous monitoring, deliverability optimization, and full DMARC protection — all in one platform.