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by 2Point

When To Audit Your Email Deliverability Rates: Key Indicators and Best Practices

Author: Haydn Fleming • Chief Marketing Officer

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Last update: May 2, 2026 Reading time: 4 Minutes

Understanding Email Deliverability

Email deliverability refers to the success rate at which your emails reach their intended inboxes. This critical metric can significantly impact your marketing efforts, affecting everything from sales to brand reputation. By understanding when to audit your email deliverability rates, you can ensure that your messaging reaches its audience effectively.

What Is Email Deliverability?

Email deliverability is not merely about sending emails; it’s about ensuring they arrive in the recipient’s inbox rather than being filtered into spam or junk folders. Factors that influence deliverability include sender reputation, email authentication, list hygiene, and content quality.

Why Is It Important to Monitor Deliverability?

Monitoring your email deliverability rates is key for several reasons:

  • Brand Reputation: High bounce rates or spam complaints can damage your sender reputation.
  • Engagement: Low deliverability means fewer recipients see your emails, leading to reduced engagement.
  • Revenue: If customers do not receive your emails, sales opportunities may be lost.

When Should You Audit Your Email Deliverability Rates?

Auditing your email deliverability rates should not be a one-time event. Instead, it should be integrated into your overall email marketing strategy. Here are several scenarios indicating when to conduct an audit:

1. Significant Drop in Open Rates

If you experience a sudden decline in open rates, it is a red flag that warrants an audit. Analyze your email metrics to see if specific segments or types of emails were affected more than others.

2. Increased Bounce Rates

High bounce rates can adversely affect your sender reputation and deliverability. If your bounce rates exceed 2%, it’s crucial to identify the cause and rectify it immediately.

3. Spam Complaints Rise

If you notice an uptick in spam complaints, it could signal that your content is not resonating with your audience or that subscribers forgot they opted into your list.

4. After Major Changes in Your Email Program

If you implement significant changes to your email program—like switching ESPs (Email Service Providers)—it’s a good time to audit deliverability rates. New platforms may have different deliverability metrics and standards.

5. Regularly Scheduled Audits

Regardless of immediate issues, regular audits—at least quarterly—help maintain a clean and high-performing email list. This proactive approach can catch issues before they escalate.

Key Components of an Email Deliverability Audit

Understanding how to conduct an email deliverability audit is vital for marketers. Here are essential steps:

1. Review Sender Reputation

Check your sender score using various online tools to measure your reputation. A score below 80 indicates issues that need attention.

2. Analyze Bounce and Complaint Rates

Identify patterns in bounce rates and complaints. Differentiate between soft bounces (temporary issues) and hard bounces (permanent issues) to know if list cleaning is necessary.

3. Validate Email Authentication

Ensure you have proper email authentication set up with SPF, DKIM, and DMARC to improve the chances of your emails reaching the inbox.

4. Evaluate List Hygiene

Examine your email lists for invalid addresses. Remove inactive or unresponsive subscribers regularly to maintain list health.

5. Examine Engagement Metrics

Review open rates, click-through rates, and conversions. Low engagement metrics often lead back to deliverability issues.

Enhancing Your Email Deliverability

After identifying areas for improvement, it’s time to take action. Here are some strategies to enhance your email deliverability:

1. Optimize Email Content

Create engaging, value-driven content that resonates with your audience. Personalization goes a long way toward improving engagement.

2. Segment Your Audience

Segment your email lists to ensure that your messages are relevant to specific groups. This will enhance open rates and reduce spam complaints.

3. Test Sending Frequency

Finding the right frequency for your emails can positively impact deliverability. Test different intervals and analyze which ones yield the best results.

4. A/B Testing

Conduct A/B tests on subject lines and content to see which styles resonate more with your audience.

5. Stay Compliant

Familiarize yourself with email marketing compliance and opt-out laws to maintain trust and credibility. Staying legal also helps your deliverability.

Frequently Asked Questions

How often should I audit my email deliverability rates?
Regular audits should be part of your strategy, ideally on a quarterly basis, to catch issues early.

What common factors affect email deliverability rates?
Key factors include sender reputation, email list quality, content relevance, and engagement metrics.

What are some tools for monitoring email deliverability?
Tools like Sender Score and Google Postmaster Tools can provide insights into your email reputation and deliverability.

Understanding when to audit your email deliverability rates is crucial for any business that relies on email marketing. By taking the necessary steps to monitor and improve your email deliverability, you can maintain strong relationships with your customers and ultimately drive revenue. Stay proactive, conduct regular audits, and optimize your email strategies for lasting success.

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