Your Domain Reputation, Protected Around the Clock
Sending email at scale is a reputation minefield. One volume spike, one bad list segment, or one ISP crackdown can undo months of careful domain building. sendmsg.io's Reputation Shield monitors every signal as it happens and adjusts your sending on its own, before damage occurs.
Email reputation management is the practice of monitoring and protecting your sending domain's standing with ISPs like Gmail, Yahoo, and Outlook. Every email you send generates signals — bounces, complaints, engagement rates — that ISPs use to decide whether your future emails reach the inbox or land in spam. sendmsg.io's Reputation Shield handles this by tracking these signals continuously and adjusting sending behavior before reputation damage occurs. The system uses a 0-100 Domain Health Score that blends ISP bounce responses, block notifications, complaint feedback loops, and engagement data across multiple time windows. When the score drops, a five-level graduated protection system (Normal, Warn, Throttle, Freeze, Paused) responds proportionally, reducing sending speed for minor issues and pausing sends for severe problems. After protection activates, Gradual Recovery resumes sending at 25% capacity and ramps up in verified stages, preventing the cascading reputation damage that can take weeks to repair manually.
How Reputation Shield Works
A continuous feedback loop that processes ISP signals live and adjusts your sending parameters on its own. No dashboards to watch. No manual throttling.
Email Sending
Your transactional and campaign emails flow through our infrastructure at the optimal rate for your reputation.
Signal Processing
Every bounce, block, deferral, and complaint from ISPs is captured and classified as it happens, not in daily batches.
Health Scoring
Signals are blended with historical performance data to produce a live health score that reflects your true reputation.
Adaptive Response
Sending speed, volume limits, and recovery strategies adjust based on the current health state.
A Single Number That Tells You Everything
Your Domain Health Score is a live value from 0 to 100 that reflects the current state of your sending reputation. It is not a vanity metric. It directly controls how the system manages your sending volume and speed.
The score is calculated by blending multiple signal sources: ISP bounce responses, block notifications, complaint feedback loops, engagement patterns (opens and clicks), and your historical sending performance across different time windows.
Domain: acme-corp.com
LiveBounce Rate
0.8%
Engagement
34.2%
Daily Capacity
45,000
Five Levels of Intelligent Protection
The system responds proportionally to the severity of reputation signals. Minor issues get light-touch responses. Serious problems trigger stronger protection on their own.
Full sending speed. Your reputation is strong across all ISPs. Engagement metrics are healthy and bounce rates are well within acceptable thresholds.
Minor deliverability signals detected. Monitoring is intensified while sending continues. The system watches for patterns that could indicate emerging issues.
Sending speed has been reduced to prevent further reputation impact. Active recovery monitoring ensures the issue resolves before speed is restored.
Sending is temporarily paused to preserve your domain reputation. This prevents cascading damage that could take weeks to recover from manually.
Extended protection is active after repeated issues. Manual review is recommended to identify root causes such as list quality or content problems before resuming.
New Domains, Warmed Up Safely
Every new sending domain starts with zero reputation in the eyes of ISPs. Sending at full volume on day one is the fastest way to get blocked. Smart Warmup progressively increases your sending volume through structured tiers, monitoring engagement at each stage.
- Volume increases as your domain builds positive history
- Engagement is verified at each stage before advancing to the next tier
- If ISP signals indicate trouble, the warmup pauses until conditions improve
- Once established, your domain transitions to dynamic volume management
Smart Warmup Progress
Sending Limits That Grow With Your Reputation
Static daily sending limits are either too conservative (leaving capacity on the table) or too aggressive (risking your reputation). Dynamic Volume Management calculates your optimal daily capacity based on historical performance, engagement trends, and your current health score.
As your domain builds positive sending history and strong engagement, your limits grow organically. If your health score dips, limits scale back proportionally, protecting your reputation without manual intervention.
- Limits recalculate based on rolling performance windows
- Growth is capped to prevent dangerous volume spikes
- Engagement quality weighs into capacity decisions
- Tomorrow's projected limit is visible before the day starts
Volume Capacity: Last 30 Days
Current Limit
45,000
Tomorrow's Projection
47,250
30d Growth
+38%
Recovery Done Right
When the system detects a problem and reduces sending speed, it does not simply flip back to full capacity once the issue appears resolved. That kind of abrupt resumption is itself a reputation risk. ISPs interpret sudden volume changes as suspicious behavior.
Instead, Gradual Recovery restores your sending capacity in measured steps. At each stage, the system verifies that ISP signals remain clean before increasing further. If problems resurface during recovery, the system steps back down immediately.
Recovery Timeline
Reputation Tracking at Every Level
A problem with one sending activity should not cripple all your sending. Reputation Shield tracks health independently at every level (activity, domain, and client), isolating issues to their source.
Per Activity
Each campaign activity has its own health state. A badly performing activity is throttled independently without affecting your other activities or transactional flow.
Per Domain
Every sending domain maintains its own reputation score. If you send from multiple domains, each one is monitored and protected independently.
Per Account
Account-level reputation provides a macro view of your overall sending health, catching patterns that span across individual domains or campaigns.
Per Infrastructure
Sending infrastructure health is tracked separately, ensuring that infrastructure-level issues are identified and addressed without affecting your domain reputation.
Continuous Monitoring, Not Daily Reports
Most email platforms run deliverability checks in daily or hourly batches. By the time you see a problem in a report, the damage is already done. Reputation Shield processes ISP feedback continuously. The moment a signal arrives, it is factored into your health score.
Hard bounces (invalid addresses) and soft bounces (temporary failures) are classified and weighted differently
When an ISP actively blocks your sending, it is detected within seconds, not hours
Spam complaints from recipients are the highest-weight signal in reputation calculation
ISP deferrals indicate your sending is being rate-limited, a precursor to blocks
Opens and clicks serve as positive reputation indicators that balance negative signals
Live Signal Feed
Why Built-in Protection Matters
Manual reputation monitoring creates dangerous gaps. Built-in protection eliminates them.
Without Built-in Protection
- ✕Reputation damage discovered hours or days after it occurs
- ✕Manual monitoring requires dedicated staff watching dashboards
- ✕Volume spikes from large campaigns go unchecked
- ✕Recovery is slow: weeks to rebuild what was lost in minutes
- ✕One bad campaign can contaminate all your sending
- ✕ISP blocks accumulate before anyone notices
With Reputation Shield
- Issues detected and responded to within seconds
- Runs on its own: no dashboards to watch, no alerts to acknowledge
- Volume spikes prevented by dynamic capacity management
- Gradual recovery restores sending safely and quickly
- Campaign-level isolation protects your entire account
- ISP relationships preserved through proactive throttling
Sender Reputation, Handled
Let Reputation Shield handle the complexity of email deliverability while you focus on building your product and growing your audience.