I’ll be straight with you. You could craft the most compelling ad campaign, target the perfect audience on Reacheffect’s advertising platform, and generate thousands of high-quality leads. But if your follow-up emails never reach their inboxes, you’ve just wasted your entire budget.

Email deliverability isn’t some technical afterthought. It’s the silent killer of marketing ROI, and most advertisers don’t realize they have a problem until it’s too late.

The Real Cost of Poor Deliverability

Here’s a stat that should wake you up: nearly 1 in 6 marketing emails never reach the inbox. That’s 16.9% of your carefully nurtured leads seeing exactly zero emails from you.

But it gets worse. Recent data shows average email deliverability to inbox decreased across all major email service providers in Q1 2025 compared to Q1 2024. We’re not talking about a minor dip. Some platforms saw drops of over 20%.

Think about what this means for your campaigns. You’re running push notifications, native ads, and banner campaigns through Reacheffect. You’re capturing email addresses from interested prospects. Then you lose nearly 20% of them before your first email even arrives.

Performance marketers face unique deliverability challenges. Unlike brands sending newsletters to opt-in subscribers, we’re often working with:

Fresh email lists from recent campaigns These contacts haven’t interacted with your domain before. Email providers see this and get suspicious fast.

High-volume sending patterns When you’re scaling campaigns through multiple ad formats on Reacheffect, your email volume spikes. Sudden increases trigger spam filters.

Time-sensitive offers You need emails delivered NOW, not three days later when they finally clear the spam folder.

Multiple domains and accounts Running offers across different verticals means juggling multiple sending domains. Each one needs its own reputation.

The data backs this up. Gmail’s inbox placement dropped from 89.8% in early 2024 to 87.2% by Q4, following stricter bulk-sender rules. Microsoft is even tougher. Office365 saw a 26.73% decrease in average inbox placement rates in just one quarter.

These aren’t random fluctuations. Email providers are cracking down, and performance marketers are caught in the crossfire.

The Warm-Up Problem Nobody Talks About

You can’t just create a new email account and start sending at scale. Providers need to see gradual, natural-looking activity first. This process is called email warm-up, and it’s non-negotiable.

Manual warm-up means:

• Sending a few emails per day initially
• Gradually increasing volume over weeks
• Ensuring high engagement rates
• Maintaining consistent sending patterns
• Monitoring blacklists and authentication settings

Do this wrong and you’ll burn through domains faster than you can set them up. Do it right and you’ll maintain 95%+ inbox placement even at high volumes.

The problem? Manual warm-up is tedious, time-consuming, and easy to mess up. One mistake and you’re starting over with a new domain.

The Automation Advantage

Here’s where things get interesting. Automated email campaigns see a 75% increase in open rate and a 114% increase in click-through rate compared to manual email campaigns.

Why? Because automation handles the tedious stuff perfectly. It warms up domains gradually, adjusts sending patterns based on engagement, and monitors deliverability issues 24/7.

For performance marketers running campaigns on Reacheffect, this is crucial. You’re focused on optimizing ad creative, testing audiences, and scaling winning campaigns. You don’t have time to manually warm up five different email domains.

Enter Warmy.io: The Deliverability Solution Built for Scale

After testing various solutions, one platform consistently delivers results: Warmy.io.

What makes Warmy different is its approach. Instead of treating warm-up as a checkbox to complete, it creates ongoing, natural-looking email activity that builds and maintains sender reputation over time.

The platform handles:

• Automated warm-up with AI-driven sending patterns
• Real-time deliverability monitoring across 30+ languages
• Automatic spam folder rescue (messages are opened, replied to, and marked important)
• Domain health checks including blacklist monitoring
• Integration with all major email providers

The results speak for themselves. Marketers using Warmy report 95%+ inbox placement rates even when sending thousands of emails daily.

But here’s what really matters: time savings. Instead of spending hours managing email warm-up manually, you set it up once and let it run. The system adapts to your sending patterns and maintains your reputation automatically.

For Reacheffect marketers juggling multiple campaigns, this is invaluable. You can focus on what actually drives revenue (optimizing your ad campaigns) instead of fighting with email deliverability issues.

The Strategic Edge

Think about your funnel. You’re spending money on push notifications, popunders, native ads, and banner advertising through Reacheffect to capture leads. Those leads cost real money.

When 20% of your follow-up emails disappear into spam folders, you’re effectively throwing away 20% of your ad spend. Fix deliverability and you instantly boost campaign ROI without spending another dollar on traffic.

The math is simple:

• 1,000 leads at $2 each = $2,000 spent
• 80% deliverability = 200 lost leads = $400 wasted
• 95% deliverability = 50 lost leads = $100 wasted
• Difference = $300 saved per 1,000 leads

Scale that across monthly campaigns and you’re looking at thousands in recovered revenue.

Best Practices for Reacheffect Marketers

Warm up new domains before launching campaigns Start this process 2-3 weeks before you plan to send at volume. Use automated tools to handle the gradual increase.

Match your warm-up content to your niche If you’re promoting dating offers, warm up with dating-related emails. If you’re in finance, use finance content. This builds relevant engagement signals.

Test deliverability before scaling Use seed lists to check inbox placement across Gmail, Outlook, Yahoo, and other major providers. Don’t assume your emails are landing in the inbox.

Monitor engagement metrics closely If open rates drop suddenly, investigate immediately. It might signal deliverability problems.

Keep multiple domains ready Have backup domains warmed up and ready to go. If one domain’s reputation takes a hit, you can switch quickly without missing sends.

Use dedicated IPs for high volume If you’re sending 100,000+ emails monthly, shared IPs put your reputation at risk. Dedicated IPs give you full control.

The Future of Email Deliverability

Email providers are getting stricter, not more lenient. Microsoft announced a new standard for bulk senders requiring DMARC records with at least p=none policy, effective May 2025. Non-compliant messages will be filtered to junk or rejected outright.

This trend will continue. Providers want to protect their users from spam, and they’re using increasingly sophisticated filters to do it. Marketers who ignore deliverability will find their emails blocked entirely.

But here’s the opportunity: most of your competitors are ignoring this. They’re focused on creative, offers, and traffic sources. Master deliverability and you’ll have a massive advantage.

Take Action Now

Email deliverability isn’t getting easier. The providers tightening their filters. Competition for inbox space is increasing. Waiting to fix deliverability problems means losing money every single day.

The good news? Solutions exist. Tools like Warmy.io handle the complex technical work automatically, letting you focus on marketing strategy instead of infrastructure management.

Start by auditing your current deliverability. Run tests across different providers. Check your authentication settings. Look at your engagement metrics. Identify gaps and fix them before they cost you serious money.