Case Study: How We Recovered and Improved Our Sender Reputation

See how we turned around a struggling sender reputation—step by step. Real data, smart strategy, and a 45% improvement in inbox placement.

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From Spam Folder to Inbox Hero 📥

Every email marketer faces the nightmare eventually: open rates dropping, inbox placement tanking, and no clear idea why. That was our reality just a few months ago.

We were dealing with a bad sender reputation—the kind that sends emails straight to spam, tanks engagement, and shakes client confidence.

But instead of panicking, we took action. This is the story of how we recovered our sender reputation step-by-step—and how you can too. 💡

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📉 The Problem: Sudden Drop in Performance

Everything seemed fine… until it wasn’t.

• Open rate dropped from 32% to 11%

• Bounce rate climbed to 6%

• Spam complaints hit 0.4% (well above the safe 0.1%)

• Campaigns were landing in junk across Gmail, Outlook, and Yahoo

Our Sender Score dropped below 70. Blacklists? ✅ We were on two.

We realized it was time for a complete sender reputation reset.

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🔍 Root Cause Analysis: What Went Wrong?

We reviewed everything, and the issues added up quickly:

• Sending to unengaged and outdated lists 🧟

• No domain warm-up after switching email platforms

• Lacked consistent sending patterns

• Weak authentication (DMARC was missing!)

• Limited visibility into engagement metrics

The fix? A multi-phase strategy that prioritized reputation repair over short-term volume.

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🔧 The Recovery Strategy: 6 Steps That Worked

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1. 🧼 Cleaned Our Email List (Aggressively)

• Removed all hard bounces

• Suppressed inactive users from the last 90 days

• Verified all new uploads using an external verification tool

• Stopped sending to role-based emails (like info@, admin@)

💡 SenderWiz automatically flagged invalid syntax and duplicates, helping us start fresh without spreadsheet headaches.

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2. 🔐 Set Up Full Authentication

We implemented:

• SPF

• DKIM

• DMARC (with enforcement policy and monitoring)

This was a trust signal inbox providers had been waiting for.

💡 SenderWiz guided us through the DNS configuration for each domain and even validated it live during setup.

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3. 🔄 Switched to Smart Rotation and Content Variability

To avoid being flagged as repetitive or spammy:

• We rotated subject lines, From names, and email content

• Avoided identical campaigns to large segments

• Used SenderWiz’s rotation engine to auto-shuffle variations

This improved engagement and helped dodge content-based filters.

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4. 📈 Rebuilt Engagement with a Smaller Audience

We focused only on our most engaged subscribers:

• Top 5,000 users who had opened or clicked in the last 30 days

• Sent educational, value-driven emails (no sales blasts)

• Personal tone, helpful subject lines, and relevant CTAs

💡 SenderWiz’s behavioral segmentation helped us isolate this “power group” fast.

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5. 🕒 Sent on a Consistent Schedule

We stopped ad-hoc sends and adopted a fixed pattern:

• Twice weekly, on Tuesday and Thursday

• Sent between 9 a.m. and 12 p.m. in the recipient's local time zone

💡 SenderWiz’s time zone–based scheduling allowed us to stay consistent, globally 🌍

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6. 🧪 Monitored Reputation and Adjusted Constantly

We used:

• Google Postmaster Tools

• GlockApps inbox testing

• Real-time dashboards in SenderWiz

Whenever metrics dipped, we paused, investigated, and tweaked. No blind sending.

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📊 The Results: From Crisis to Comeback

Here’s what changed over the next 8 weeks:

Metric	Before	After
Open Rate	11%	28% ✅
Spam Complaints	0.4%	0.02% ✅
Bounce Rate	6%	1.2% ✅
Inbox Placement	53%	78% ✅
Sender Score	68	93 ✅

We were off blacklists, back in the inbox, and—most importantly—trusted again by our audience.

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What We Learned (So You Don’t Have to)

• Authentication is everything — set it up before you send

• Clean lists beat big lists

• Reputation isn’t lost in a day — and recovery isn’t instant

• Smart tools like SenderWiz make recovery easier, faster, and more data-driven

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Final Thought: Every Reputation Can Be Rebuilt

If your sender reputation has taken a hit, don’t give up. What matters most is how quickly and smartly you respond.

✅ Start small ✅ Focus on engagement ✅ Monitor obsessively ✅ Use smart tech

With SenderWiz on your side — from authentication and segmentation to rotation and warm-up — you can recover, rebuild, and rise higher than ever before 🚀