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The 6 Best Email Deliverability Tools To Unlock Inbox Success In 2023

Email marketing success hinges on one crucial factor: inbox deliverability. It’s the make-or-break moment when your emails either reach your audience or disappear into the digital abyss.

In this guide, we’ll provide the 6 best email deliverability tools that will supercharge your campaigns, ensuring your messages not only land in the inbox but also stand out and drive engagement.

The Best Email Deliverability Tools

Here are some deliverability tools you should consider adding to your arsenal:


MailGenius is a robust email marketing tool, specifically designed to help email marketers fine-tune their email campaigns and ensure that their messages consistently land in the inboxes of their intended recipients. This email testing platform offers a variety of features and services tailored to simplify the complex world of email deliverability.

Note: Try MailGenius today and unlock the full potential of your email campaigns. Get started now and receive 3 test emails for free! Make every email count.

Why MailGenius Reigns Supreme

In essence, MailGenius is the trusted ally email marketers need to overcome delivery challenges and reach their audience effectively. Here’s how it does that:

Cracking Down on Spam Signals

MailGenius doesn’t just skim the surface when it comes to spam testing — it delves deep to ensure your emails are virtually spam-proof. It provides a Spam Score, indicating your email’s likelihood of being flagged as spam. This score helps you understand how spam filters view your email, enabling precise adjustments to enhance email deliverability.

Effortless Testing

Not everyone’s a tech whiz, and that’s where MailGenius excels. The process is straightforward: send a test email to the address provided by MailGenius, and then easily access your spam score and detailed report on their platform. This user-friendly design means that email marketers of all skill levels can use MailGenius without any hassle.

Bulletproof Email Security Checks

In an era marked by phishing and email spoofing threats, safeguarding your emails is crucial. MailGenius takes proactive measures by conducting rigorous security testing. It examines and verifies SPF (Sender Policy Framework), DKIM (DomainKeys Identified Mail), and DMARC (Domain-based Message Authentication Reporting and Conformance) records, which are crucial for email authentication. Try MailGenius’ SPF tester here.

These records serve as your email’s digital bodyguards, ensuring that your emails are recognized as legitimate and not impostors trying to deceive recipients and email servers. By meticulously verifying these records, MailGenius helps bolster your own email account’s security, preventing unauthorized entities from impersonating your brand and protecting your domain’s reputation.

Actionable Data for Email Deliverability

MailGenius doesn’t just hand you a score and bid you farewell. It also provides detailed reports on your test emails that go beyond the surface. These reports cover factors that include: 

  • Sender Score: This reveals how mailbox providers perceive your emails, offering a clear picture of your sender reputation.

  • Authentication Records: As mentioned earlier, MailGenius verifies SPF, DKIM, and DMARC records to ensure proper authentication.

  • Content Analysis: Beyond technical aspects, MailGenius examines your email content for potential spam triggers, including subject lines, body, and sender’s name.

  • HTML Best Practices: Ensuring clean HTML code is crucial for consistent rendering across email clients. MailGenius checks for HTML errors and inconsistencies.

  • Server Configuration: Your email server setup can influence deliverability, and MailGenius assesses it for potential issues.

But the email deliverability tool doesn’t just point out problems; it goes further by offering practical suggestions for improvement. With this level of detail, you gain a clear understanding of the obstacles that might be preventing your emails from reaching the inbox. 

Positive User Experiences and Real-World Wins

User feedback is the ultimate testament to a tool’s effectiveness, and MailGenius boasts a portfolio of glowing testimonials. Email marketers who have implemented MailGenius into their strategies have witnessed immediate returns and experienced a noticeable uptick in email deliverability.

These real-world success stories serve as compelling proof of the tool’s effectiveness and its capacity to deliver tangible results, further solidifying its status as a top-tier email testing solution. 

Features That Set MailGenius Apart

MailGenius is your Swiss Army knife for email deliverability, offering a rich array of features to empower email marketers:

  1. Email Tester: Instant scoring for email delivery success.

  2. Monitoring: Real-time domain health checks, including daily blacklist, deliverability tests.

  3. Tests: Comprehensive examinations, covering blacklist status, SPF, DKIM, and DMARC authentication.

  4. Free Resources: Access to a valuable email deliverability checklist for inbox success.

  5. Email Deliverability Audit: A detailed assessment of your email performance.

  6. Spam Testing: Protection against common spam filters.

  7. Blacklist Checking: Continuous monitoring to ensure your domain’s reputation remains intact.

  8. Content Analysis: In-depth evaluation and optimization of email content.

  9. Authentication Checks: Verification of SPF, DKIM, and DMARC records.

  10. Link and Image Checking: Ensures the safety and validity of email links and images.

  11. HTML Validation: Identifies and rectifies HTML errors.

  12. Server Configuration Checks: Assessment of email server setup.

  13. Detailed Reports: Comprehensive feedback with actionable insights for email deliverability enhancement.

How to Test Your Emails With MailGenius

Here’s a simple step-by-step guide to help you get the most out of this powerful tool:

  1. Compose and Send a Test Email: Start by crafting your email as you normally would. Once it’s ready, send it to the unique email address provided by MailGenius for testing. This step is as straightforward as sending any regular email from your email client.

  2. Evaluate Your Email with MailGenius: After dispatching your test email, head to the MailGenius website and locate the ‘See Your Score’ option. Click on it. Now, let MailGenius work its magic. The tool will swiftly analyze your email, scrutinizing it for a range of deliverability factors.

  3. Decipher Your MailGenius Score: Your MailGenius score isn’t just a number. It’s like a guide that tells you how likely your email is to end up in the recipient’s inbox. But the real gold is in the report itself.

  4. Dive into the Comprehensive Report: As we mentioned beforeMailGenius doesn’t leave you guessing. Its comprehensive report is a treasure trove of information. It covers various aspects, including your sender score, SPF, DKIM, DMARC, content analysis, HTML best practices, and more. Each section dissects the performance of your email in these critical areas.

  5. Implement Recommendations: Equipped with insights from the MailGenius report, it’s time to take action. Start by making the necessary changes to your email practices based on the recommendations provided. This could involve tweaking your content to avoid spam triggers, setting up or fine-tuning authentication protocols like SPF, DKIM, and DMARC, or even cleaning up your email list to improve list hygiene. The key is to follow through diligently on the recommendations provided by MailGenius.

  6. Continuously Test and Adjust: While one-time testing is beneficial, maintaining a proactive approach is key to sustained success. Incorporate MailGenius into your routine by using it regularly to test your emails. The email landscape evolves, and so should your strategies. Regular testing helps you stay ahead of potential issues and ensures your email practices remain aligned with ever-changing regulations and best practices.

MailGenius Pricing

MailGenius offers a welcoming hand to newcomers with three free tests, allowing you to dip your toes into the waters of email testing without committing to a subscription. It’s a fantastic opportunity to get acquainted with the tool and witness its benefits firsthand.

For those who wish to harness MailGenius more extensively and take full advantage of its features, there are paid subscription plans available. These plans are structured to accommodate varying needs and domain requirements. Here’s a breakdown of the pricing tiers based on the number of domains:

  • Single Domain Plan: $99/month: This plan is tailored for those managing a single domain. It offers a comprehensive suite of MailGenius features for enhancing deliverability and email performance.

  • Two Domains Plan: $198/month: If you’re overseeing multiple domains, the Two Domains Plan provides you with the tools to optimize email deliverability across both domains. It’s a cost-effective choice for businesses with a broader reach.

  • Three Domains Plan: $297/month: For those juggling email marketing across three domains, this plan ensures that each domain receives dedicated attention and monitoring, helping you maintain top-notch deliverability.

  • Four Domains Plan: $396/month: The Four Domains Plan caters to businesses with an extensive online presence. It allows you to manage and test emails across four domains efficiently, ensuring that your emails consistently reach their intended recipients.


Folderly bills itself as an all-in-one email deliverability platform, and it largely lives up to this claim. The email deliverability tool offers a comprehensive solution to tackle all your email-related challenges. It promises to enhance and improve your email deliverability significantly, ensuring that your emails consistently reach your recipients’ inboxes.

One standout feature is its Inbox Placement Monitoring, which lets you keep tabs on your emails’ location across different Email Service Providers (ESPs), consistently ensuring they land in the primary inbox.

Email authentication is a breeze with Folderly’s assistance in fixing essential DNS records like SPF, DKIM, DMARK, and BIMI. This authentication process ensures that your emails are not just delivered but also trusted by ESPs.

Creating captivating email templates can be challenging, and Folderly offers a template analysis feature to help you identify and fix elements that might trigger spam filters. Plus, you can easily create and manage custom templates that match your brand and messaging.

The platform’s domain health checkup provides quick insights into your domain’s deliverability score, enabling informed decisions to enhance email performance. It also seamlessly integrates with popular and custom ESPs to ensure compatibility with your existing email marketing platform.

Embracing AI in email conversations can be a game-changer. Folderly harnesses AI to enhance your email communication, potentially leading to improved engagement and higher response rates.

Key Features

  • Domain Health Checkup

  • Email Deliverability Testing

  • Inbox Placement Monitoring

  • DNS Records Fix

  • Blacklists and Spam Filters Monitoring

  • Result-Based Email Interactions

  • Custom Email Templates

  • Template Analysis for Spam Triggers

  • Email Templates Dashboard

  • AI-Powered Email Conversations is an essential tool for email marketers, designed to enhance the quality of your email list and boost the effectiveness of your marketing campaigns. It’s all about ensuring that your emails reach the right people, sparing you from the frustration of wasted resources and frustrating dead-ends of undeliverable addresses

Mail Tester is more than just your run-of-the-mill list-cleaning tool. It’s a comprehensive solution designed to help you streamline your email marketing efforts. On top of scrubbing and cleansing your email lists, it also catches and eliminates irrelevant and invalid email addresses too, ensuring that your campaigns hit the bullseye.

Internet Service Providers monitor how often you send emails to questionable addresses. Exceed a certain threshold, and your sender reputation takes a nosedive. The result? Your emails languish in spam folders or, worse yet, end up on dreaded blacklists. Mail Tester verifies your email list, securing a pristine sender reputation, and equips you with tools like duplicate email remover, spam trap removal, risk validator, and more to polish your email list.

It allows you to cherry-pick specific results with selected downloads, providing you with the flexibility to tailor your list according to your campaign’s unique requirements. Real-time blacklist monitoring keeps you vigilant, ensuring that you are aware of any potential issues before they become critical problems. This.

Collaboration is key in any marketing team, and recognizes this. With its team account features, your team can work seamlessly together, improving efficiency and productivity. What’s more,’s anti-grey-listing technology ensures that no email account goes unverified, giving you peace of mind that your list is thorough and dependable.

Integration is seamless with You can easily integrate it with your favorite email marketing applications, making the transition to cleaner lists a breeze. Also, the email delivery platform offers flexible pricing options that cater to all budgets, making it accessible to both small businesses and large enterprises. You can choose the plan that suits your needs without breaking the bank.

Key Features

  • Email List Verification

  • Catching and Eliminating Irrelevant and Invalid Addresses

  • Sender Reputation Protection

  • Tools for List Polishing

  • Team Account Collaboration

  • Anti-Grey-Listing Technology

  • Specific Result Selection

  • Real-Time Blacklist Monitoring

  • Seamless Application Integration

  • Flexible Pricing Options


One of GlockApps’ standout features is its Inbox Placement and Spam Score Testing Tool. It allows you to test where your emails end up with different email providers, offering you valuable insights into the email journey from sender to recipient. This tool ensures that your emails reach the right destination, sparing you the agony of having your messages relegated to the spam folder.

The platform also offers a comprehensive Content and Design Analysis tool, which examines your email’s content and design for potential issues that could affect email placement. It identifies problems like broken HTML code, broken links, image size issues, and the presence of spam-triggering words.

GlockApps takes a holistic approach to spam score testing with its Seed List Testing feature. It uses a seed list of email addresses from various providers to give you a 360-degree view of how your emails perform across different email platforms. You can even customize the seed list to include specific email providers relevant to your audience.

When you run inbox placement tests through GlockApps, you receive detailed reports that include information on email placement, sender score, blacklisting status, and analysis using tools like Barracuda and SpamAssassin. 

Plus, GlockApps doesn’t just point out problems; it provides actionable recommendations to help you improve your email campaigns.

To make your experience even more convenient, GlockApps offers an automated email deliverability testing tool. This tool allows you to schedule tests at specific times, keeping you informed through email notifications and providing insights into email authentication by analyzing DMARC reports from your domain.

Beyond email testing, GlockApps also offers uptime monitoring for websites, IPs, email servers, SPF, DKIM, and DMARC records. If any of these components encounter issues, GlockApps alerts you immediately, allowing you to address problems promptly and ensure your emails keep flowing.

Key Features

  • Inbox Placement and Spam Score Testing.

  • Authentication Protocol Verification.

  • IP and Domain Cleanliness Check.

  • Content and Design Analysis.

  • Seed List Testing (Customizable).

  • Detailed Test Report (Including IP scores, blacklisting status, authentication, and more).

  • Content Analysis (Identifying issues in HTML, links, images, and content).

  • Actionable Recommendations.

  • Automated Testing and Notifications.

  • DMARC Analysis.

  • Uptime Monitoring for Websites, IPs, Email Servers, and Authentication Records with Alerts.


NeverBounce offers a suite of powerful features that enhance your email and marketing automation efforts. At its core lies a robust email verification feature, providing insights into recipient engagement, and making your follow-ups and subject line testing more effective. This precision ensures that your campaigns are targeted towards engaged and interested recipients.

What sets NeverBounce further apart is its adaptability. Whether you have a small or massive email list, it’s designed to accommodate lists of any size, eliminating the restrictions that can hinder your email marketing. Plus, it sends only one message per person, eliminating the need for managing multiple lists and minimizing the risk of spamming your recipients.

Personalization is the secret sauce of effective email marketing, and NeverBounce excels in this regard. It offers extensive customization options beyond simple text adjustments, allowing you to personalize messages with unique images for each recipient, making your emails truly stand out.

Creating compelling emails is a breeze with NeverBounce’s customizable templates. You can design templates that suit your brand’s style, including adding images and videos. This feature streamlines your campaign creation process, saving you time and effort.

NeverBounce prides itself on its user-friendly interface. Whether you’re an experienced email marketer or a beginner, the intuitive design ensures seamless navigation without the need for extensive technical expertise. It’s a tool that empowers users across all skill levels.

Staying organized in the digital clutter of emails can be challenging. NeverBounce’s Inbox Zero feature helps you maintain order by sending relevant emails only to subscribed recipients. This ensures that your messages aren’t lost in a sea of unopened emails.

However, NeverBounce doesn’t limit itself to email alone. It encourages social sharing of your messages on platforms like Facebook and Twitter, expanding your reach and fostering engagement beyond the confines of the inbox.

Key Features

  • NeverBounce verifies email opens for follow-ups and subject line testing.

  • Works with any list size, sending one message per person, reducing the need for multiple lists.

  • Customize messages, including unique images for each email.

  • Set up unique subject lines in multiple lists to avoid duplicate email addresses.

  • Create custom templates with images and videos in NeverBounce.

  • Helps you avoid spam complaints and spam traps

  • Easily merge multiple, duplicateF email addresses into one list for streamlined management.

  • Pay-as-you-go pricing based on email volume.

  • Known for its intuitive interface.

  • Send messages directly from your email inbox.

  • Encourages sharing on platforms like Facebook and Twitter.

  • Organizes emails for subscribed recipients only.

  • Supports various email campaign types, including updates, announcements, and invitations.

Sender Score

Sender Score is your gateway to understanding your sender reputation, much like a credit score for financial trustworthiness. Monitoring your Sender Score is the first step in ensuring your email program’s healthy standing with email service providers (ESPs) and recipients.

The free tool assigns a numerical value between 0 and 100, shedding light on your sender reputation quality and how mailbox providers perceive your IP address.

  • Poor (0-70): Signals your email reputation needs attention and repair due to potentially risky sending behaviors, affecting your email performance.

  • Fair (70-80): Indicates a reasonably decent IP reputation with room for improvement. Industry best practices and email program optimization can enhance results.

  • Good (80+): A score of 80 or higher signifies commendable sending habits and a stellar email reputation, often recognized and rewarded.

A key component of your sender reputation is your sending IP’s reputation. Sender Score provides an IP Reputation Check tool to scrutinize your domain reputation and sending IP’s reputation, identifying red flags hampering your deliverability.

Sender Score is also equipped with a Blocklist Status feature that notifies you if your IP address is listed on any known blocklists. This early warning system is crucial in preventing your emails from being lost in the abyss of blocked emails and safeguarding your sender reputation. The free tool also provides ESP Rejection Insights, shedding light on the reasons behind these rejections.

Ultimately, every email marketer is keen to assess their email campaigns’ revenue potential. Sender Score’s Email Revenue Calculator provides an estimate of your email campaigns’ revenue potential, giving you valuable insights to guide your decisions.

Key Features

  • Track your email program’s reputation.

  • Verify IP status on Return Path Blocklist.

  • Assess contact list legitimacy.

  • Compare performance globally.

  • Calculate campaign potential.

  • Identify bounce reasons for improvements.

  • Assess your sending IP’s reputation.

  • Gain insights on ESP rejections.

Wrapping Up

MailGenius outshines the competition as the premier email deliverability tool for a simple reason: it combines comprehensive email deliverability features into one seamless, budget-friendly package. It delves deep into spam signals, ensuring near immunity to filters, all while maintaining a user-friendly interface. With robust security checks and actionable data, it fortifies your emails against threats and provides clear paths for improvement.

Whether you’re a seasoned email marketer or a beginner, MailGenius empowers you to optimize your email campaigns effortlessly, ensuring they reach their destination with unmatched precision and security. Don’t just take our word for it – try a free email deliverability test today.