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11 Best email deliverability tools for 2024

Reading Time: 8 minutes

There’s a common belief that all emails sent will reach the recipient’s inbox.

Unfortunately, that’s a myth.

The reality? Many factors influence if an email lands in the inbox or spam folder or gets blocked. 

But the good news is there are email deliverability tools to help you.

These tools allow you to monitor various elements of your email campaigns. That ensures messages reach their intended audience. 

Like many tools, there are a lot of options to choose from, which can make your decision more difficult. So in this article, we review 11 email deliverability tools to boost your email marketing efforts. 

Keep reading!

Omnisend has multiple features designed to help you reach the inbox instead of the spam folder. Start for free.

What is an email deliverability tool?

An email deliverability tool is software designed to increase your chances of landing in the inbox instead of the spam folder. They analyze factors like your sender reputation, engagement, and adherence to email protocols, identifying potential issues that may lead to emails marked as spam. As a result, they can enhance the success of your emails.

Why should you use an email deliverability tool?

As mentioned, email deliverability tools exist to help you. More specifically, they can help you with the following:

  • Email validation and verification: The tools ensure email addresses are valid, which helps to maintain a clean and healthy list. In turn, this can reduce bounce rates and enhance deliverability and engagement.
  • Spam testing: By analyzing for potential spam triggers, your emails are more likely to land in recipients’ inboxes and less likely to be flagged as spam by filters. 
  • Reputation monitoring: Maintaining a positive sender reputation is a crucial and ongoing process, and deliverability tools play a significant role.
  • Inbox placement testing: Deliverability tools simulate email delivery to various ISPs. This helps predict inbox placement and provide insights into how emails will perform across different email service providers.
  • Blacklist monitoring: Deliverability tools can monitor if the sender’s IP is included on email blacklists and notify users so you can take prompt action. Regular blacklist checks are essential to maintaining a trustworthy sender image, and help to prevent unintended disruptions to email communication.
  • Feedback loop analysis: These tools analyze feedback from ISPs on user complaints, providing insights into user satisfaction. Monitoring feedback loops ensures that marketers stay attuned to subscriber preferences and concerns, which fosters positive engagement and minimizes the risk of complaints.
  • Deliverability rate tracking: By monitoring the emails delivered to recipients’ inboxes, deliverability tools help to gauge the effectiveness of email campaigns. That allows continuous improvement for optimal deliverability rates. 

11 Best email deliverability tools

Here are the 11 best email deliverability tools to enhance your email marketing efforts.

1. Omnisend

Email deliverability tool - Omnisend
Image via Omnisend

Omnisend is an email marketing automation platform tailored for ecommerce businesses. 

It allows you to manage and send emails, SMS, and push notifications all in one platform. 

In addition, Omnisend has tools to help your email deliverability.

Key features

  • Email list cleaning services.
  • Audience segmentation which allows targeting and improves subscribers’ engagement.
  • Has a Domain Signature (SPF/DKIM). This helps build a credible sender reputation with a custom sender domain. 
  • 24/7/365 support to all users.
  • Automated workflows that welcome and nurture your subscribers.
  • Omnichannel marketing through emails, SMS, and push notifications.


Omnisend offers a generous free-forever plan and two paid plans:

  • Standard: Starting at $16 per month
  • Pro: Starting at $59 per month

For email cleaning services, Omnisend charges $0.20 per 100 contacts. 

2. Google Postmasters

email deliverability tool - Google Postmasters
Image via Google Postmasters

Google Postmaster Tools monitors email marketing performance on Gmail, G Suite, and other mailing systems, as well as offering data on delivery errors, spam reports, and sender reputation metrics.

Key features

  • Cross-platform performance tracking.
  • Detailed information on delivery errors for quick issue resolution.
  • Alerts users to spam reports, aiding in the prevention of deliverability issues.
  • Crucial metrics for maintaining and improving sender reputation.
  • Insights to help you optimize email marketing strategies.
  • A customizable alerting system for immediate notification of email delivery issues.
  • Furnishes ISP-specific feedback, enabling tailored adjustments for inbox placement.
  • Interactive data visualizations for a dynamic email analytics experience.


Google Postmasters is completely free.

3. Spamhaus

Email deliverability tool - Spamhaus
Image via Spamhaus

Spamhaus maintains an extensive database of known spammers and malicious entities. The database helps safeguard email senders.

It operates a robust, real-time threat intelligence network that helps identify and block potentially harmful email traffic, and it ensures that your emails reach the intended recipients while avoiding spam traps.

Key features

  • Spam detection database that helps detect known spammers and threats.
  • Real-time threat intelligence by blocking malicious entities. 
  • Enables users to mitigate risks associated with potential email threats proactively.
  • Ensures messages reach intended recipients by blocking communication with harmful sources.
  • Can help safeguard the sender’s reputation.
  • Utilizes a global network of sensors for accurate information on email threats.
  • Conducts automated compliance checks to ensure adherence to email-sending best practices.
  • Continuous monitoring of sender IP addresses and domains for consistent deliverability.
  • Reliable Email Reputation Services


Spamhaus is a free email deliverability tool.

4. SenderScore

Email deliverability tool - Senderscore
Image via SenderScore

Senderscore evaluates sender reputation based on various factors, including email volume and blacklistings. As a result, it can help you monitor and enhance your sender score. 

Key features

  • Sender reputation score checks 
  • Robust blocklist lookup. This helps to identify potential issues by checking for sender blacklisting.
  • Real-time bounce lookups.
  • List quality checks to improve list quality for optimized email performance.
  • Email revenue calculator to provide insights into potential revenue generation from email campaigns.
  • Actionable sender insights to rectify issues and maintain a positive sender reputation.
  • Monitors the reputation of sender IP addresses to ensure consistent email deliverability.
  • Provides insights into historical trends, allowing users to track and analyze score changes.
  • Offers data on the geographical distribution of email recipients for targeted campaigns.


Sender Score is a free email tool.

5. Mailtester

Email deliverability tool - Mailtester
Image via Mailtester

Mailtester is a robust email deliverability tool that ensures optimal email performance by identifying duplicate and bounced emails

Key features

  • Offers email list cleaning by identifying duplicate and bounced emails. 
  • Filters out spam traps, reducing the risk of emails being marked as spam.
  • Flags and removes emails with high-risk keywords for improved deliverability.
  • Ensures the accuracy of email domains and syntax to enhance email performance.
  • Ensures the accuracy of email syntax for error-free communication.
  • Monitors and evaluates the health of email domains to prevent potential issues.
  • Identifies catch-all domains to improve accuracy in email validation.
  • Allows users to customize testing parameters for tailored email validation.
  • Facilitates seamless integration with other systems through API for efficient workflows.
  • Provides instant and up-to-date results for quick decision making.
  • Scans for and eliminates emails containing high-risk keywords to enhance deliverability.
  • Validates email domains and MX records to ensure accurate email routing.
  • Performs real-time verification to validate the existence of email addresses.
  • Offers customizable list cleaning options for tailored email hygiene management.


Mailtester is a free email deliverability tool.

6. Mx Toolbox

Email deliverability tool - Mx Toolbox
Image via Mx Toolbox

MX Toolbox ensures reliable communication by offering comprehensive solutions including real-time blacklist checks.

Key features

  • Inbox placement analysis service to enhance visibility.
  • Recipient complaint reporting to address potential issues promptly.
  • Email delivery performance insights.
  • Analyzes mail server configurations for efficient email infrastructure.
  • Blacklist monitoring to prevent deliverability obstacles.
  • Optimizes SPF records to enhance email authentication and deliverability.
  • Monitors both inbound and outbound mail flow for comprehensive email performance insights.
  • Constantly monitors real-time blackhole lists to prevent potential deliverability issues.
  • Evaluates the SSL/TLS configuration of mail servers for secure email communication.
  • Provides detailed analysis of email headers for troubleshooting and optimization.
  • Centralized dashboard for comprehensive reporting on various email performance metrics.


Mx Toolbox has a free tier and two paid plans:

  • Delivery Center: $129 per month
  • Delivery Center Plus: $399 per month

7. DKIM, SPF, and DMARC Checkers

Email deliverability tool - Dmarcian
Image via Dmarcian

This tool validates DKIM signatures, SPF records, and DMARC policies to ensure authentication integrity. 

In addition, it empowers users to fortify their email authentication mechanisms by offering real-time checks and detailed reports.

Key features

  • DKIM signature validation for email authentication.
  • SPF record verification to enhance sender authentication.
  • Verifies DMARC policies for comprehensive email security.
  • Instant validation to fortify email authentication.
  • In-depth reports for precise authentication insights.
  • Safeguards against unauthorized use, phishing, and spam.
  • Enhances the sender’s reputation for reliable and trusted email delivery.
  • Analyzes DMARC policies to enhance email authentication and prevent domain spoofing.
  • Detects potential phishing threats by evaluating email authentication mechanisms.
  • Conducts real-time DNS queries to verify the status of authentication records.
  • Optimizes bounce handling mechanisms for effective email delivery.
  • Provides a customizable reporting dashboard for comprehensive insights into authentication status.


DKIM, SPF, and DMARC checker offers a 14-day free trial and the following plans:

  • Personal: $0
  • Basic: $24 per month
  • Plus: $240 per month
  • Enterprise: $600 per month

8. Mailtrap

Email deliverability tool - Mailtrap
Image via Mailtrap

The Mailtrap email tool serves as a staging environment for testing email campaigns. It ensures accurate testing by preventing emails from reaching real inboxes, which helps avoid potential spam issues. 

Key features

  • Facilitates pre-deployment testing for accurate email campaign assessment.
  • Offers spam prevention by intercepting emails before they reach real inboxes.
  • Allows users to simulate various email scenarios for comprehensive testing.
  • Assists in optimizing email campaigns by assessing design and content.
  • Provides in-depth analysis for thorough testing and campaign refinement.
  • Enables collaborative testing, ensuring seamless and error-free email campaigns.
  • Validates HTML and CSS elements within emails for proper rendering.
  • Enables thorough testing of SMTP server configurations for reliable email sending.
  • Supports the simulation of multiple testing environments for diverse email scenarios.


Mailtrap offers different pricing plans for email testing and email sending.

Email testing

  • Free: $0
  • Individual: $14.99/month
  • Team: $34.99/month
  • Business: $64.99/month
  • Premium: $129.99/month
  • Enterprise: $399.99/month

Email sending

  • Free: $0
  • Individual 10k: $10/month
  • Business 100k: $85/month
  • Enterprise 1.5M: $750/month
  • Custom (over 5k): Custom pricing

9. MailMonitor

Email deliverability tool - MailMonitor
Image via MailMonitor

MailMonitor ensures campaign success by offering real-time insights and comprehensive analysis. It monitors inbox placement, spam filter performance, and engagement metrics.  

Key features

  • Instant, real-time analysis for effective campaign management.
  • Comprehensive inbox placement monitoring to ensure optimal visibility.
  • Spam filter performance analysis for enhanced deliverability.
  • Suggestions to optimize email campaigns.
  • Tracks engagement metrics for data-driven campaign refinement.
  • Conducts seed list testing to ensure accurate campaign assessment.
  • Monitors competitors, to help you stay ahead in email performance.
  • Facilitates the testing of dynamic content elements within email campaigns.
  • Integrates seamlessly with A/B testing tools for comprehensive campaign optimization.


Here are MailMonitor’s pricing plans:

  • Starter: $49/month
  • Advanced: Custom pricing

10. Unspam email

Email deliverability tool - unspam
Image via Unspam

Unspam employs advanced spam filter testing and analysis that allow users to identify potential issues that may impact deliverability. Its focus on optimizing email communication can prevent messages from being marked as spam. 

Key features

  • Advanced spam filter testing to prevent emails from being marked as spam.
  • Provides valuable insights into spam score metrics for effective optimization.
  • Offers precise suggestions to refine email campaigns and ensure deliverability.
  • Analyzes email content to identify and rectify potential issues.
  • Blacklist monitoring for proactive issue resolution.
  • Empowers users to maintain a positive sender reputation for consistent inbox placement.
  • Ensures emails consistently reach recipients’ inboxes.


Unspam offers free and paid plans. Here are the paid plans:

  • Basic: $9/month
  • Business: $19/month
  • Agency: $29/month

11. Folderly

Email deliverability tool - Folderly
Image via Folderly

Folderly focuses on optimizing inbox placement and minimizing emails marked as spam. Using real-time monitoring, it identifies potential deliverability issues and offers actionable recommendations.

Key features

  • Real-time deliverability monitoring to identify and resolve deliverability issues.
  • Utilizes AI technology to provide actionable recommendations and key metric insights.
  • Monitors and maintains a positive sender reputation for optimal inbox placement.
  • Analyzes email engagement metrics for data-driven campaign refinement.
  • Conducts spam testing to minimize the risk of emails being marked as spam.
  • Email authentication checks to ensure secure and authenticated email communication.
  • Validates email attachments and HTML elements to prevent issues and enhance deliverability.
  • Monitors the sender’s reputation continuously.
  • Customizable alert system that helps notify users of potential deliverability challenges.


Folderly offers pricing plans depending on the number of Mailboxes:

  • 1-9 mailboxes: $120/mailbox/month
  • 10-24 mailboxes: $90/mailbox/month
  • 25-99 mailboxes: $70/mailbox/month
  • 100-499 mailboxes: $50/mailbox/month
  • 500+ mailboxes: Custom pricing

Wrap up

So, which is the best email deliverability tool? 

Each tool in this list is unique in its offerings and strengths. They collectively contribute to a robust email deliverability strategy, from ensuring spam compliance to maintaining a positive sender reputation. Each plays a crucial role and they offer a diverse range of features to cater to specific needs.

A good email deliverability tool helps enhance the sender’s reputation, optimizes content, and monitors real-time metrics. 

By utilizing these tools, you give your emails every chance to be delivered effectively.

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Richard White
Article by
Richard White

Richard is a Content Marketing Manager at Omnisend. An avid writer, he's said to have been born holding a pencil. Fascinated by all things handmade, if he's not reading or writing he can often be found practicing leathercraft.