Best Email Deliverability Tools

Email deliverability measures how many of your emails get successfully delivered to your recipients’ inboxes. It has become a key component of a successful email campaign that affects important metrics, such as open rates and click-through rates, conversions, and revenues, as well as marketing campaign effectiveness. 

But why would your email not reach the intended inbox if everyone else’s does? Well, the average email deliverability rate is 83.1%, not 100%: this means that one in six legitimate emails never reaches the target. Common challenges businesses face with regard with email deliverability are spam filters, blacklists, and email authentication failures. 

We’ve compiled a list of the best email deliverability tools to help you overcome these challenges and meet your email marketing objectives!

Key Features of Email Deliverability Tools

Below are the key features of email deliverability tools that can help you avoid common email deliverability failures and get your emails delivered where they need to be. 

Email Authentication Support (SPF, DKIM, DMARC)

When we talk about email authentication protocols such as DMARC, SPF, and DKIM, we mostly discuss them in the context of protecting our domains from unauthorized use, spoofing attempts, and phishing attacks. However, these protocols can also be of significant help when it comes to enhancing email deliverability. As they help authenticate the emails, they can help reduce the likelihood of valid, legitimate messages being marked as spam while simultaneously establishing trust with email providers and thereby boosting deliverability. 

Blacklist Monitoring and Spam Testing

When you fall into a domain blocklist (i.e., a database of IP addresses/domains flagged as spammy or suspicious), you may experience a significant decline in your email deliverability rate. Thankfully, there are digital tools online that help you check your domain reputation. 

Consider using blocklist monitoring tools to track your domain’s placements in hundreds of DNS blocklists.

IP Reputation and Domain Health Management

Did you know that ISPs assign a sender reputation score based on your sending history and patterns? When you continuously send irrelevant content that recipients don’t engage with, or when you suddenly start sending too many emails, your sender reputation score may decrease. It might potentially negatively affect your email deliverability. You can make use of online IP reputation monitoring tools to check your domain reputation and get insights into your overall email sending performance. 

Inbox Placement Testing

When talking about inbox placement, we mean the specific folder where your email will fall into after you send it; it can be your primary inbox, your spam folder, promotions, or any other folder of yours. Most senders want their email to appear in the primary inbox folder, as this would give their message a higher chance of being seen and potentially acted upon by the intended recipient. 

There are several steps you can take for your email to fall into the primary inbox. For example, you can remove inactive subscribers (i.e., those who have ignored your email in 6-12 months) to keep your subscriber list up to date. Try to avoid sending generic texts to all and instead use targeted, personalized, relevant messages to segmented audiences. You can also use inbox placement tools to get an idea of where your email might possibly fall into.

Detailed Reporting and Analytics

Some ESPs have better email deliverability and customer support features than others. Try choosing an ESP that provides detailed analytics and thorough reporting capabilities (potentially encompassing list management, segmentation, and automation). This can help you gain valuable insights into your domain health and performance and address any minor issues before they become major ones. 

Now that you know what to look for, here are 5 top email deliverability tools to consider in 2025.

PowerDMARC 

PowerDMARC offers DMARC, SPF, and DKIM enforcement with advanced reporting and security monitoring. The platform can also help significantly boost email deliverability. 

In fact, DMARC aggregate reports (RUA) help domain owners gain a bird’s eye view of their overall email traffic, which can help you fix any issues like unauthorized use or bad sender reputation on time and thereby improve deliverability. However, DMARC Aggregate reports are often difficult to understand, preventing domain owners from understanding the information and, therefore, leaving the security gaps unseen. PowerDMARC solves this issue by simplifying these reports and turning them into easy-to-understand visualizations.

PowerDMARC can also help you with forensic reports (RUF) by encrypting them with a private key that only you can access, thereby preventing unauthorized use, spoofing, and phishing. Improvements in your overall email security and reputation may, in turn, contribute to less spam and more primary inbox placement!

Key Benefits

• PowerDMARC offers 7 distinct viewing formats you can choose from to see your data in a format that you prefer (e.g., based on geolocation, organization, sender source, etc.) 
• PowerDMARC makes aggregate reports easy to understand and protects the sensitive data found in forensic reports, thereby contributing to higher protection, better reputation, and enhanced deliverability. 
• In addition to DMARC services, PowerDMARC also provides SPF and DKIM enforcement for a well-rounded, comprehensive security online. 
• The 24/7 customer service ensures your email authentication and deliverability failures are addressed promptly. 
• The multitude of languages supported by the platform makes it an international (not just local) solution to email authentication and deliverability problems. 

Mailgun 

Mailgun is a well-renowned email delivery service that helps enable developers and businesses to send, receive, and track emails more efficiently. It provides email API and SMTP services along with a large variety of email automation capabilities, transactional emails, and numerous other services. It has a dedicated Mailgun Optimize service that helps avoid the spam folder, maximize primary inbox placement, and enhance the overall sender reputation.

Key Benefits 

• Mailgun’s email deliverability services encompass a Dedicated Technical Account Manager (TAM).
• The platform provides a personalized onboarding engagement, along with a custom deliverability strategy and expert support guidance.
• In addition to the strategizing stage, the tool also helps with the reporting, overseeing, and consulting aspects of email deliverability. 
• Mailgun Optimize email deliverability tool suite
• With Mailgun, you can preview your emails in as many as 100+ different devices, as well as make use of blocklist monitoring and inbox placement testing services.

Postmark 

Postmark is a well-reputed cloud-based SaaS email service provider that specializes in delivering transactional emails. In addition to SMTP services and email API, it also offers numerous other services for email delivery and deliverability for entities of different sizes, such as startups, agencies, enterprises, side projects, developers, etc. Its Message Streams feature helps optimize the deliverability (not just delivery) of different email types by separating and categorizing them into dedicated streams. 

Key Benefits 

• Postmark improves email deliverability through dedicated anti-spam measures.
• With Postmark, you can enjoy seamless, hassle-free integration with numerous platforms and frameworks (e.g., WordPress).
• Postmark puts particular emphasis on data security and privacy. Among other security measures, it also makes use of TLS encryption for email transmissions to protect your sensitive data in the transfer process. 

SendGrid®

SendGrid® is an email API provider that enables businesses to optimize to enhance their customer communications. The platform helps the developer to leverage its API and craft large-scale marketing and transactional emails. In addition to email building and automation functionalities, it also offers analytics tools with which you can track customer engagement and evaluate the effectiveness of your campaigns.

Key Benefits

• With SendGrid®, you can easily monitor primary metrics, including information on processed mail, delivered mail, delivery failures, open rates, etc. 
• The tool also enables users to track email deliverability trends over time to identify any patterns (e.g., sudden drop in email deliverability rate) to take proactive action accordingly. 
• The platform provides dynamic, customized, and professional recommendations and best practice guidelines based on your current performance. 

Mailtrap

Mailtrap helps catch your test emails and display them in virtual inboxes. It allows development teams to effectively test, view, and share different types of email (including transactional) sent from development and staging environments. As a result, it helps easily test emails without ever bothering or spamming actual customers.

Key Benefits 

• Mailtrap enables you to check if personalization functions as initially designed. It also checks the headers for accuracy. 
• The platform provides spam and domain blacklisting reports. 
• You can quickly organize your email testing data with corresponding inboxes and projects for easy and convenient access. 

How to Choose the Right Tool

Here are some of the main factors that may impact your choice when selecting an email deliverability tool among the many offers. 

Business Size, Email Volume, and Security Needs 

Whether a tool is right for you or not depends on a variety of factors. Some of the most important factors affecting the choice include business size, email volume, and scope of security needs. For example, a small business with low volume might opt for a tool that has a limited variety of features but is financially convenient. A larger firm with a complex email infrastructure may prefer to pay more money but instead gain access to a large variety of advanced features and capabilities. 

Comparing Free vs. Paid Solutions

Some tools are available free of charge but offer only limited capabilities for email deliverability, while others are paid solutions that come with numerous advanced features, thorough reporting, detailed analytics, etc. You may also find an optimal choice that is both financially convenient and has a sufficient variety of features for your security needs. It is not a question of whether paid solutions are better than free ones; it’s about what’s best based on your needs, preferences, and business targets. 

Final Thoughts

Email deliverability tools can help you save money, time, and nerves in your email marketing campaigns, enjoy a higher ROI, and get your messages across to the intended recipient. The market is full of tools and resources that can help you navigate email deliverability challenges and reach a deliverability rate that’s 90% or higher! 

Regardless of your current deliverability rate, it is important to evaluate your email performance regularly to find any issues before it’s too late. Then, you can easily use the recommended tools to address any deliverability gaps you have in your email infrastructure for better email deliverability results!

• About
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Milena Baghdasaryan

Content Specialist at PowerDMARC

Milena is a skilled writer and content creator with 7+ years of experience in crafting engaging content on IT, cybersecurity, virtual events, and more. She has a proven track record of delivering high-quality work for international magazines and is a graduate of prestigious institutions such as New York University Abu Dhabi, UWC China, and the College of Europe.

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