Complete Sender Compliance & Reputation
Your emails reach the inbox only when your sender infrastructure is healthy. Postmaster+ monitors every signal that affects deliverability — reputation scores, DNS authentication, spam complaints, and blocklist status — across all major mailbox providers in a single dashboard.
What We Monitor
Mailbox Provider Reputation Data
Postmaster+ aggregates reputation data from Gmail Postmaster Tools, Microsoft SNDS (Outlook/Hotmail), Yahoo, and Comcast into a unified dashboard. Instead of logging into four separate portals and manually checking each one, you see all your domain and IP reputation scores in one place with historical trending.
DNS & Authentication Monitoring
Misconfigured authentication is the #1 preventable cause of deliverability problems. Postmaster+ continuously monitors your SPF, DKIM, DMARC, TLS, and IP reverse DNS records. When something breaks — a new sending IP missing from SPF, an expired DKIM key, a DMARC policy change — you'll know immediately.
Complaint Rate Monitoring
Google requires complaint rates below 0.3% to maintain good standing. Microsoft and Yahoo have similar thresholds. Postmaster+ tracks your spam complaint rate across providers with customizable alert thresholds, so you can catch a spike before it damages your reputation.
Current Rate
0.02%
Well below threshold
Warning
0.10%
Alert triggered
Danger
0.30%
Google threshold
Domain & IP Blocklist Monitoring
Not all blocklists matter. Postmaster+ monitors only the blocklists that actually affect email delivery — Spamhaus, Barracuda, SORBS, and other lists that mailbox providers actively query. No noise from irrelevant hobby lists that create false alarms.
Instant Alerts When Things Change
Deliverability issues cost money for every hour they go undetected. Postmaster+ sends alerts the moment something changes — a DNS record breaks, your complaint rate spikes, or your IP lands on a blocklist.
Email Alerts
Instant notification to your team when a monitored metric crosses your configured threshold.
Trend Detection
Spot gradual reputation decline before it becomes a crisis with historical trending and trendline analysis.
Custom Thresholds
Set alert levels that match your sending patterns. High-volume senders need tighter thresholds than occasional mailers.
Who Needs Deliverability Monitoring?
Email marketers & senders
If you send marketing, transactional, or lifecycle emails, your reputation directly impacts whether those emails reach the inbox. Monitoring catches problems before they snowball.
Deliverability teams
Replace manual checks across Gmail Postmaster Tools, SNDS, and blocklist lookup sites with a single automated dashboard. Focus on fixing issues, not finding them.
Email service providers (ESPs)
Monitor customer sending domains and IPs across your platform. Identify problematic senders before they affect shared infrastructure.
IT & security teams
Ensure email authentication (SPF, DKIM, DMARC) stays correctly configured as infrastructure changes. Catch misconfigurations immediately.