Email Deliverability Tracking: Key Metrics and Best Practices

10
Min
Published On
June 19, 2024
Updated On
July 14, 2025
Recreated On:
July 13, 2025
Email Deliverability Metrics

Email Deliverability Tracking: Key Metrics and Best Practices

10
Min
Created On:
June 19, 2024
Updated On:
July 14, 2025
Email Deliverability Metrics

Table of Content

Monitoring inbox performance tells you whether your emails are actually reaching users, or just collecting dust in spam folders. Knowing this is key to maintaining sender trust and boosting campaign results. In this guide, you’ll explore the top metrics to track and practical strategies to improve your email success rate.

Key Takeaways

  • Keeping tabs on inbox placement is crucial for making sure your emails land where they belong, boosting credibility and campaign performance.
  • Core indicators like message delivery rate, bounce ratio, spam complaints, and engagement stats (opens, clicks) help you evaluate and improve how well your emails perform.
  • Tried-and-true methods like domain authentication, scrubbing your list, and content optimization are essential for staying out of spam and reaching your audience.

How to Measure Email Delivery Effectively

An infographic illustrating email deliverability tracking metrics.

Monitoring inbox reach helps marketers know whether their messages are actually being seen. Strong delivery rates support sender trust and smooth communication. The main goal here? To make sure your emails show up in the primary inbox, not the spam dungeon.

Factors like sender reputation, authentication methods, and content quality can affect deliverability rates. Regularly keeping tabs on deliverability of these metrics can help identify issues that might hinder email delivery on the recipient’s server, including the sender policy framework.

Given the complexity of factors affecting email deliverability, staying updated with technological advancements helps maintain effective communication.

Top Email Deliverability Metrics

Email deliverability is crucial for lead generation and customer engagement. Tracking key indicators ensures your emails consistently reach the inbox. Email deliverability metrics offer valuable insights into your email campaigns’ performance and highlight areas needing improvement. To effectively track email deliverability, it’s important to analyze these metrics regularly.

Positive email deliverability metrics like clicks and opens increase the likelihood of emails reaching inboxes. Measuring email deliverability involves tracking several indicators, not just one. Here are a few relevant metrics to help you monitor and improve your email deliverability.

Delivery Rate

In email marketing, the delivery rate indicates the percentage of emails accepted by the servers of recipients. This is calculated based on the total number of emails sent and the number of emails delivered. It’s calculated using the formula:

Delivery Rate = (Number of Emails Sent - Number of Bounces) /  Total Emails Sent.

Another method to calculate the deliverability rate is using the formula (Delivered Emails / Total Sent) x 100.

A rate above 95% indicates a healthy mailing list, contributing to campaign success. Improving this involves steps to ensure emails are successfully delivered to recipient mailboxes. This includes maintaining list hygiene, authenticating emails, and monitoring deliverability metrics consistently.

Bounce Rates

The bounce percentage shows how many emails failed to reach inboxes in a campaign.

Bounce Rate = (Emails Returned ÷ Total Sent) × 100.

Typical causes include invalid email addresses, full inboxes, and server-side issues. A spike in this metric usually points to poor list quality or shady sending practices (like soft bounces).

If left unchecked, high soft bounce rates can damage your sender rep. Stick to verified contacts, remove inactive subscribers, and review your averages regularly to stay in the clear.

Spam Complaint Rates

The complaint rate is one of the key email deliverability metrics which indicate how often recipients mark an email as spam. Understanding spam complaint rates is crucial as they indicate that recipients find emails unwanted, directly impacting deliverability. A rising spam complaint rate can damage sender reputation and lead to blacklisting.

High spam complaint rates suggests to email providers that recipients are finding your email frequency irrelevant. They could also feel that the messages are too frequent or overly pushy. Monitoring spam filters and spam complaint rates helps identify if recipients find emails unwanted, affecting deliverability and potentially leading to spam traps.

Maintaining a spam complaint rate below 0.1%, ideally under 0.03%, helps uphold a good sender reputation and prevents needless email bounces.

Open and Click-Through Rates

The open rate tells you how many subscribers actually opened your email. CTR (click-through rate) shows how many clicked a link inside. This is compared to the total number of emails delivered. Engagement metrics like these can directly influence email deliverability.

Key points about email marketing performance include:

  • A high click-through rate indicates audience engagement and effective content.
  • Personalizing email messages using tokens can significantly enhance engagement and relevance.
  • Analyzing open and click rates offers insights into subscriber engagement and content effectiveness.

Tools for Tracking Email Deliverability

Tracking email deliverability effectively requires the right tools. These tools provide insights into key indicators and help identify issues affecting performance. From monitoring email bounce rates to analyzing spam complaints, these platforms can significantly enhance your email marketing efforts.

Here are some top tools for tracking email deliverability, ensuring your emails consistently reach the inbox placement of the recipient’s inbox and email service providers.

Google Postmaster Tools

Google Postmaster Tools is a platform for monitoring email deliverability metrics, allowing users to comprehensively visualize their performance. One benefit of Google Postmaster Tools is its use of simple graphs to visualize email deliverability metrics.

The interface of Google Postmaster Tools has been recently revamped. This update aligns it with the Workspace interface. This makes it more user-friendly and accessible, helping marketers track key inputs and optimize their email campaigns effectively.

SendPulse

SendPulse is a comprehensive email marketing platform that aids in improving email deliverability. It features a built-in spam trap checker that evaluates email content and provides suggestions for improving deliverability. This helps ensure that emails reach the intended target audience inboxes and not their spam folders.

SendPulse’s spam checker helps marketers craft better email content, enhancing overall deliverability. With its robust features, SendPulse is an excellent tool for optimizing email campaigns and ensuring high deliverability rates.

MXToolbox

MXToolbox specializes in providing tools like IP Blacklist Check and Email Health Report to diagnose and enhance email deliverability challenges. These tools are essential for identifying issues with inbox placement that could prevent emails from reaching the recipient’s mailbox providers.

Using MXToolbox ensures that emails are not being blocked or sent to the junk folder. This helps maintain a high sender reputation and improves inbox placement rate, which ultimately boosts the overall success of email campaigns.

Best Practices for Improving Email Deliverability

A good email deliverability rate is over 90%. Achieving this benchmark is crucial for effective campaigns. Consistently low delivery rates can hurt sender reputation and reduce future email acceptance. Ensuring a high ip reputation and domain reputation involves following best practices, monitoring reputation metrics, and regularly cleaning email lists.

Following best practices like using unsubscribe link and citing deliverability data effectively can result in improved email deliverability. Here are some deliverability best practices to enhance your email deliverability.

Authenticate Your Emails

The main authentication protocols required for email authentication are SPF, DKIM, and DMARC. Setting up these protocols is essential for email authentication. Proper email domain authentication increases email trustworthiness, reducing the chance of being marked as spam, and domain based message authentication plays a crucial role in this process.

Implementing these email authentication protocols significantly enhances email deliverability and helps to maintain a positive sender reputation. Authenticating emails landing improves their chances of landing in the recipient’s inbox.

Clean Your Email List Regularly

Cleaning your email list involves:

  • Removing invalid or outdated addresses to reduce hard bounce rates.
  • Regularly reviewing engagement metrics to identify inactive subscribers and inform removal strategies.
  • Implementing a sunset policy to manage inactive subscribers, allowing for timely removal from email lists.

Regularly cleaning your email list by removing unengaged subscribers enhances overall inbox placement rates and improves deliverability. This practice ensures that your emails are reaching active and interested recipients.

Optimize Email Content

Compelling subject lines, visually appealing elements, and clear call-to-action buttons significantly enhance email content effectiveness. Quality email content should be relevant content, valuable, and engaging, avoiding spammy words like excessive capital letters and exclamation marks.

Sending email campaigns around 8-9 am is recommended for better open and click-through rates. Benefits of a defined sending schedule and performance review include:

  • Avoiding being marked as spam
  • Regularly reviewing campaign performance reports
  • Assessing engagement metrics like open and click rates effectively
  • Informing future content strategies

Monitoring Trends Over Time

Monitoring sending reputation helps maintain positive engagement rates and improves future email performance. Consistently tracking email tracking performance can uncover new trends, optimizing future campaigns.

Analyzing performance trends can help marketers identify successful strategies and areas needing improvement. Tracking performance trends over time is crucial for making data-driven decisions.

Campaign Performance Reports

Key performance indicators (KPIs) like:

  • open rate
  • click rate
  • bounce rate are essential metrics to evaluate in email campaigns.

Aiming for ‘Excellent’ or ‘Good’ status for your performance indicators is crucial for ongoing campaign success. If your performance indicator status is ‘Poor’ or ‘Fair’, implementing new strategies to improve these metrics is essential.

Custom Reporting

Custom reports and regular engagement audits offer several benefits:

  • Provide in-depth  insights into specific metrics and trends that standard reports may not capture.
  • Help identify unresponsive subscribers that may negatively impact overall deliverability.
  • Refine email marketing strategies by analyzing patterns in engagement and deliverability, including detailed reports.

This allows for more targeted and effective email campaign personalized email campaigns, improving overall performance in a particular email.

Responding to Changes in Email Deliverability

Apple Privacy Protection has altered how your visibility metrics like open rates are tracked, requiring marketers to adjust their strategies. Managing unengaged subscribers is crucial as industry standards evolve, ensuring email lists remain effective and relevant.

Identifying and removing unengaged segments involves monitoring the data, segmenting lists, and using automation tools for list hygiene. Adapting to changes and maintaining list hygiene ensures email campaigns remain successful.

Adapting to Apple Mail Privacy Protection

In September 2021, Apple introduced significant changes in email privacy that affect tracking subscriber engagement and deliverability. Adapting to Apple Mail Privacy Protection involves using alternative tracking metrics and ensuring content quality to retain subscriber interest.

Managing Unengaged Subscribers

Unengaged subscribers can harm your email deliverability and overall campaign performance. Identifying unengaged segments involves analyzing subscriber behaviors such as open rates and click-through rates. Removing unengaged segments from your mailing list is crucial to improve email deliverability.

Regularly monitoring and cleaning your subscribers inboxes of unengaged users helps maintain healthy deliverability, including managing unsubscribe links and tracking the unsubscribe rate.

Frequently Asked Questions

What is inbox email performance tracking?

Tracking inbox performance is essential for marketers to see if their emails are actually reaching the inbox instead of getting lost in spam. It ensures your message connects with your audience effectively.

What’s the role of a dedicated IP address in email deliverability?

A dedicated IP address gives you more control over your sending reputation. Unlike shared IPs, it isolates your email activity, helping you build a strong sender reputation if managed well.

How does a cold email campaign affect deliverability?

If not done right, a cold email campaign can trigger spam filters and result in high unsubscribe rates. Warm up your inbox, personalize your content, and follow sending limits to stay in the safe zone.

How can I calculate my email reach rate?

Use this simple formula: (Emails Sent – Bounced Emails) ÷ Emails Sent

This gives you a clear picture of how many messages successfully made it to your recipients’ inboxes.

Why should I monitor my deliverability tab and domain reputation?

Your deliverability tab (available in some ESPs) shows real-time inbox metrics. Combined with a solid domain reputation, it gives you insight into how mailbox providers perceive your emails and create strategies to manage unsubscribe rates.

Why is it important to clean my email list regularly?

Cleaning your email list regularly is essential because it helps keep your hard bounce rates low and boosts engagement. This way, you ensure that your messages reach the right people effectively.

What tools can I use to track email deliverability?

You can use tools like Google Postmaster Tools, SendPulse, and MXToolbox to effectively track email deliverability and pinpoint any issues that may arise. These tools offer valuable inputs to help ensure your emails reach their intended recipients.

How do conversion rates relate to campaign performance?

Conversion rates show whether your emails are actually getting results, like clicks, sign-ups, or purchases. They're a key part of measuring overall campaign performance and ROI.

What do engagement metrics tell me about my campaigns?

Engagement trackers like open rate, CTR, and scroll depth reveal how users interact with your content. Monitoring these helps you improve future email campaigns and tailor content more effectively.

Final Thoughts

Tracking inbox performance is the cornerstone of successful email campaigns. Email providers often analyze key variables like hard bounce percentage, open rate, spam flags, and user engagement stats, marketers can ensure their emails hit the right spot. Tools like Google Postmaster Tools, SendPulse, and MXToolbox offer actionable insights, helping resolve potential delivery roadblocks.

Following smart sending practices like email authentication, list hygiene, and content tuning can greatly improve inbox success. Plus, adapting to evolving standards, like Apple Mail Privacy Protection, and removing inactive subscribers ensures your outreach stays effective. With these strategies, you’ll boost engagement, protect your sender credibility, and ensure your campaigns perform at their best.

Ready to track inbox performance and optimize your email campaigns effectively? Sign up for Smartlead today to gain actionable insights and boost engagement seamlessly.

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Author’s Details

Nitish Chauhan

I write about cold outreach, sender reputations, and all the email things you Google at 2 am so you don’t have to.

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Frequently asked questions

General Questions

What is Smartlead's cold email outreach software?

Email automation FAQs- Smartlead

Smartlead's cold email outreach tool helps businesses scale their outreach efforts seamlessly. With unlimited mailboxes, fully automated email warmup functionality, a multi-channel infrastructure, and a user-friendly unibox, it empowers users to manage their entire revenue cycle in one place. Whether you're looking to streamline cold email campaigns with automated email warmups, personalization fields, automated mailbox rotation, easy integrations, and spintax, improve productivity, or enhance scalability with subsequences based on lead’s intentions, automated replies, and full white-label experience, our cold email tool implifies it in a single solution.

What is Smartlead, and how can it enhance my cold email campaigns?

Email automation FAQs- Smartlead

Smartlead is a robust cold emailing software designed to transform cold emails into reliable revenue streams. Trusted by over 31,000 businesses, Smartlead excels in email deliverability, lead generation, cold email automation, and sales outreach. A unified master inbox streamlines communication management, while built-in email verification reduces bounce rates.
Additionally, Smartlead offers essential tools such as CNAME, SPF Checker, DMARC Checker, Email Verifier, Blacklist Check Tool, and Email Bounce Rate Calculator for optimizing email performance. 

How does Smartlead's unlimited mailboxes feature benefit me?

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Our "unlimited mailboxes" feature allows you to expand your email communications without restrictions imposed by a mailbox limit. This means you won't be constrained by artificial caps on the number of mailboxes you can connect and use. This feature makes Smartlead the best cold email software and empowers you to reach a wider audience, engage with more potential customers, and manage diverse email campaigns effectively.

How does Smartlead, as a cold emailing tool, automate the cold email process?

Email automation FAQs- Smartlead

Smartlead’s robust cold email API and automation infrastructure streamline outbound communication by transforming the campaign creation and management processes. It seamlessly integrates data across software systems using APIs and webhooks, adjusts settings, and leverages AI for personalised content.

The cold emailing tool categorises lead intent, offers comprehensive email management with automated notifications, and integrates smoothly with CRMs like Zapier, Make, N8N, HubSpot, Salesforce, and Pipedrive. Smartlead supports scalable outreach by rapidly adding mailboxes and drip-feeding leads into active campaigns Sign Up Now!

What do you mean by "unibox to handle your entire revenue cycle"?

Email automation FAQs- Smartlead

The "unibox" is one of the unique features of Smartlead cold email outreach tool, and it's a game-changer when it comes to managing your revenue cycle. The master inbox or the unibox consolidates all your outreach channels, responses, sales follow-ups, and conversions into one centralized, user-friendly mailbox.

With the "unibox," you gain the ability to:
1. Focus on closing deals: You can now say goodbye to the hassle of logging into multiple mailboxes to search for replies. The "unibox" streamlines your sales communication, allowing you to focus on what matters most—closing deals.

2. Centralized lead management: All your leads are managed from one central location, simplifying lead tracking and response management. This ensures you take advantage of every opportunity and efficiently engage with your prospects.

3. Maintain context: The "unibox" provides a 360-degree view of all your customer messages, allowing you to maintain context and deliver more personalized and effective responses.

How does Smartlead ensure my emails don't land in the spam folder?

Email automation FAQs- Smartlead

Smartlead, the best cold email marketing tool, ensures your emails reach the intended recipients' primary inbox rather than the spam folder. 

Here's how it works:
1. Our "unlimited warmups" feature is designed to build and maintain a healthy sending reputation for your cold email outreach. Instead of sending a large volume of emails all at once, which can trigger spam filters, we gradually ramp up your sending volume. This gradual approach, combined with positive email interactions, helps boost your email deliverability rates.

2. We deploy high-deliverability IP servers specific to each campaign. 

3. The ‘Warmup’ feature replicates humanized email sending patterns, spintax, and smart replies.
 
4. By establishing a positive sender reputation and gradually increasing the number of sent emails, Smartlead minimizes the risk of your emails being flagged as spam. This way, you can be confident that your messages will consistently land in the primary inbox, increasing the likelihood of engagement and successful communication with your recipients.

Can Smartlead help improve my email deliverability rates?

Email automation FAQs- Smartlead

Yes, our cold emailing software is designed to significantly improve your email deliverability rates. It enhances email deliverability through AI-powered email warmups across providers, unique IP rotating for each campaign, and dynamic ESP matching.
Real-time AI learning refines strategies based on performance, optimizing deliverability without manual adjustments. Smartlead's advanced features and strategies are designed to improve email deliverability rates, making it a robust choice for enhancing cold email campaign success.

What features does Smartlead offer for cold email personalisation?

Email automation FAQs- Smartlead

Smartlead enhances cold email personalisation through advanced AI-driven capabilities and strategic integrations. Partnered with Clay, The cold remaining software facilitates efficient lead list building, enrichment from over 50 data providers, and real-time scraping for precise targeting. Hyper-personalised cold emails crafted in Clay seamlessly integrate with Smartlead campaigns.

Moreover, Smartlead employs humanised, natural email interactions and smart replies to boost engagement and response rates. Additionally, the SmartAI Bot creates persona-specific, high-converting sales copy. Also you can create persona-specific, high-converting sales copy using SmartAI Bot. You can train the AI bot to achieve 100% categorisation accuracy, optimising engagement and conversion rates.

Can I integrate Smartlead with other tools I'm using?

Email automation FAQs- Smartlead

Certainly, Smartlead cold email tool is designed for seamless integration with a wide range of tools and platforms. Smartlead offers integration with HubSpot, Salesforce, Pipedrive, Clay, Listkit, and more. You can leverage webhooks and APIs to integrate the tools you use. Try Now!

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Is Smartlead suitable for both small businesses and large enterprises?

Smartlead accommodates both small businesses and large enterprises with flexible pricing and comprehensive features. The Basic Plan at $39/month suits small businesses and solopreneurs, offering 2000 active leads and 6000 monthly emails, alongside essential tools like unlimited email warm-up and detailed analytics.

Marketers and growing businesses benefit from the Pro Plan ($94/month), with 30000 active leads and 150000 monthly emails, plus a custom CRM and active support. Lead generation agencies and large enterprises can opt for the Custom Plan ($174/month), providing up to 12 million active lead credits and 60 million emails, with advanced CRM integration and customisation options.

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What type of businesses sees the most success with Smartlead?

No, there are no limitations on the number of channels you can utilize with Smartlead. Our cold email tool offers a multi-channel infrastructure designed to be limitless, allowing you to reach potential customers through multiple avenues without constraints.

This flexibility empowers you to diversify your cold email outreach efforts, connect with your audience through various communication channels, and increase your chances of conversion. Whether email, social media, SMS, or other communication methods, Smartlead's multi-channel capabilities ensure you can choose the channels that best align with your outreach strategy and business goals. This way, you can engage with your prospects effectively and maximize the impact of your email outreach.

Email automation FAQs- Smartlead

How can Smartlead integrate with my existing CRM and other tools?

Smartlead is the cold emailing tool that facilitates seamless integration with existing CRM systems and other tools through robust webhook and API infrastructure. This setup ensures real-time data synchronisation and automated processes without manual intervention. Integration platforms like Zapier, Make, and N8N enable effortless data exchange between Smartlead and various applications, supporting tasks such as lead information syncing and campaign status updates. Additionally, it offers native integrations with major CRM platforms like HubSpot, Salesforce, and Pipedrive, enhancing overall lead management capabilities and workflow efficiency. Try Now!

Email automation FAQs- Smartlead

Do you provide me with lead sources?

No. Smartlead distinguishes itself from other cold email outreach software by focusing on limitless scalability and seamless integration. While many similar tools restrict your outreach capabilities, Smartlead offers a different approach.

Here's what makes us uniquely the best cold email software:

1. Unlimited Mailboxes: In contrast to platforms that limit mailbox usage, Smartlead provides unlimited mailboxes. This means you can expand your outreach without any arbitrary constraints.

2. Unique IP Servers: Smartlead offers unique IP servers for every campaign it sends out. 

3. Sender Reputation Protection: Smartlead protects your sender reputation by auto-moving emails from spam folders to the primary inbox. This tool uses unique identifiers to cloak all warmup emails from being recognized by automation parsers. 

4. Automated Warmup: Smartlead’s warmup functionality enhances your sender reputation and improves email deliverability by maintaining humanised email sending patterns and ramping up the sending volume. 

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How secure is my data with Smartlead?

Ensuring the security of your data is Smartlead's utmost priority. We implement robust encryption methods and stringent security measures to guarantee the continuous protection of your information. Your data's safety is paramount to us, and we are always dedicated to upholding the highest standards of security.

How can I get started with Smartlead?

Email automation FAQs- Smartlead

Getting started with Smartlead is straightforward! Just head over to our sign-up page and follow our easy step-by-step guide. If you ever have any questions or need assistance, our round-the-clock support team is ready to help, standing by to provide you with any assistance you may require. Sign Up Now!

How can I reach the Smartlead team?

Email automation FAQs- Smartlead

We're here to assist you! You can easily get in touch with our dedicated support team on chat. We strive to provide a response within 24 hours to address any inquiries or concerns you may have. You can also reach out to us at support@smartlead.ai

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