Shared IP Reputation Management

MailerLogic uses managed shared IP pools to give customers fast, reliable email delivery without the complexity of managing IP reputation on their own. This article explains how shared IPs work, how we protect you from bad actors, and how we safeguard legitimate senders.

How Shared IP Pools Work

When you send emails through MailerLogic’s shared IP pools, your messages are delivered from IP addresses shared with other verified senders.

Why shared IPs?

• Immediate access to established sending reputation

• Faster inbox placement for new senders

• No IP warmup required

• Reputation management handled entirely by MailerLogic

Our systems continuously monitor and protect shared IP health so you don’t have to.

Protection FROM Bad Actors

How does MailerLogic prevent bad senders from harming my reputation?

MailerLogic uses a five-layer protection system to keep shared IP pools clean and trusted.

1. Content Filtering (Before Sending)

Every email is scanned before entering the sending queue:

• Spam keyword and pattern detection

• Link reputation and phishing checks

• Attachment validation

• HTML structure and header inspection

🚫 High-risk emails are quarantined and never sent through shared IPs.

2. Real-Time Sender Behavior Monitoring

We continuously monitor sender activity across shared IPs:

• Bounce rate (target: < 2%)

• Spam complaint rate (target: < 0.1%)

• Engagement signals (opens and clicks)

• Sending volume consistency

⚡ Suspicious behavior is isolated automatically—often within minutes.

3. IP Pool Health Scoring

Each shared IP pool is monitored 24/7 for:

• Blacklist status (50+ global blocklists)

• ISP feedback (Gmail, Outlook, Yahoo, etc.)

• Delivery and reputation scores

🛑 Unhealthy IP pools are disabled automatically, and senders are moved to clean IPs with no action required.

4. Strict Sender Onboarding

Before accessing shared IPs, all senders must:

• Verify domain ownership (SPF, DKIM, DMARC)

• Provide verified business information

• Accept MailerLogic’s Terms of Service

• Pass initial reputation checks

✅ Only legitimate, verified businesses can use shared IPs.

5. Intelligent Rate Limiting

Built-in safeguards prevent abuse:

• Hourly and daily send limits

• Gradual ramp-up for new senders

• Automatic throttling for unusual patterns

🔒 No single sender can overwhelm or damage the shared pool.

Protection FOR Legitimate Senders

What if I’m incorrectly flagged?

MailerLogic is designed to protect good senders, not punish them.

Multi-Factor Decision Making

We never suspend accounts based on a single metric. Decisions consider:

• Overall content quality

• Historical sender reputation

• Hard vs. soft bounce patterns

• Complaint context

• Long-term volume consistency

⚠️ Automated flags trigger review, not instant suspension.

Human Review Process

• All shared IP enforcement actions require human review

• Review response within 2-4 hours

• Customers are notified before action is taken

• Clear explanation and supporting evidence provided

• Fair and transparent appeal process

👩‍💻 Real people review every decision.

Real-Time Transparency

You always know where you stand:

• Delivery and engagement metrics

• Health Score

• Proactive alerts for bounces, complaints, or risks

👀 You see issues before they become problems.

Automatic Protection from Others’ Mistakes

If a shared IP reputation drops due to another sender:

• The bad actor is removed immediately

• You’re automatically moved to a clean IP

• Blacklist removal is handled by MailerLogic

• No service interruption

🛡️ You’re protected without lifting a finger.

Technical Safeguards

Content Risk Scoring

0–30   ✅ Excellent – Instant send
31–60  ✅ Good – Normal queue
61–80  ⚠️ Moderate – Monitored
81–100 🚫 High risk – Quarantined

Scoring factors:

• Spam word density (30%)

• Link quality (25%)

• HTML structure (20%)

• Header authenticity (15%)

• Historical engagement (10%)
  
  

Sender Risk Scoring

0–20   ✅ Excellent sender
21–40  ✅ Normal sender
41–60  ⚠️ Warning issued
61–80  ⏸️ Temporary pause
81–100 🚫 Isolated from shared pools

Risk factors:

• Bounce rate (35%)

• Complaint rate (30%)

• Engagement rate (20%)

• Volume consistency (15%)
  
  

Your Rights & Privacy

What MailerLogic Monitors

✅ Delivery and bounce rates
✅ Spam complaint metrics
✅ Aggregate engagement data
✅ Sending volume patterns
✅ External reputation signals

What We Do Not Monitor

❌ Individual email content (unless auto-flagged)
❌ Recipient personal data
❌ Subscriber-level behavior
❌ Customer lists or business data

If You’re Incorrectly Flagged

You are entitled to:

1. Immediate notification

2. Clear explanation with evidence

3. Fast appeal (human review within 2 hours)

4. Suspension reversal if false positive

5. Service credit for wrongful enforcement

⚖️ Appeals are always handled by humans—not algorithms.

Common Scenarios

Scenario 1: Another sender causes a blacklist

What happens:

1. Blacklist detected within minutes

2. Offending sender isolated

3. You’re moved to a clean IP

4. Delisting handled automatically

5. You’re notified of resolution

Impact: None. Zero interruption.

Scenario 2: Bounce rate spikes after a bad import

What happens:

1. Bounce spike detected

2. Immediate alert sent

3. Temporary pause applied

4. Human review evaluates context

5. You clean the list and resume sending

Impact: Short pause, no suspension, guidance provided.

Scenario 3: Legitimate email flagged as spam

What happens:

1. Email is quarantined (not rejected)

2. You review it in the dashboard

3. Manual release option available

4. System learns from correction

Impact: One delayed send, improved future accuracy.

Best Practices for Strong Reputation

List Hygiene

• Remove hard bounces immediately

• Use double opt-in

• Process unsubscribes within 24 hours

• Remove inactive subscribers

Content Optimization

• Balance text and images

• Use clear sender identity

• Send only expected content

• Test emails before large sends

Technical Setup

• Configure SPF correctly

• Enable DKIM signing

• Use DMARC for protection

• Register ISP feedback loops
  
  

Dedicated IP Option

For customers who want full control, a dedicated IP may be ideal if you:

• Send 300,000+ emails per month consistently

• Maintain strong engagement (20%+ opens)

• Want zero shared-pool exposure

Dedicated IP Benefits

• Your reputation only

• No shared sender risk

• Custom warm-up strategies

• Advanced monitoring

🔥 MailerLogic handles the entire warm-up process for you.

Summary

✔ Five-layer protection against bad actors
✔ Multi-factor, human-reviewed decisions
✔ Full transparency and real-time alerts
✔ Automatic protection from shared IP issues
✔ Fast, fair appeals process
✔ Privacy-first monitoring