15 Best Email Testing Tools To Improve Email Performance

Sending emails for your small business can generally be a bit difficult. You will usually face problem on the subject of sending emails equivalent to having invalid emails, getting low deliverability charges, or having emails going into spam folders.

Did , in 2022, spam emails accounted for about 49% of the full electronic mail quantity worldwide?

But right here’s the most effective half, there are some nice electronic mail testing instruments that may make your electronic mail campaigns rather more efficient and may be sure that they get delivered.

In this text, we’ll introduce you to the 15 greatest electronic mail testing instruments that may provide help to enhance your electronic mail efficiency.

So, in case you’ve been struggling to get your emails good, you’re in the correct place to search out some options that may make your electronic mail advertising journey a complete lot smoother.

So let’s start.

Email testing instruments are important for bettering your electronic mail advertising campaigns. They guarantee your emails attain the inbox, look nice on all units, and provide help to ship higher emails. Ultimately boosting open charges, and enhancing buyer engagement.

Following are a few of the key metrics that an electronic mail must be examined for earlier than going reside.

Deliverability & Spam Score

Table of Contents

Email testing instruments assist guarantee your emails really attain your recipients’ inboxes. They examine for widespread points which will result in emails being marked as spam or not delivered in any respect.

These instruments analyze your electronic mail content material, sender status, and area authentication to supply a spam rating and options for enchancment.

Email Client Preview

Emails can look completely different on numerous electronic mail purchasers and units. Email testing instruments supply a preview of how your electronic mail will seem on completely different platforms, equivalent to Outlook, Gmail, cell units, and webmail companies. This ensures a constant and visually interesting presentation for all recipients.

HTML Preview of Emails

Email advertising usually includes HTML coding. Email testing instruments let you preview the HTML rendering of your emails.

So when you’ve got any points or corrections within the coding that may have an effect on the e-mail’s look or performance, you may establish that with HTML previewes.

Content Spam Score

When it involves electronic mail deliverability, avoiding spam filters turns into completely essential. Spam testing instruments will examine for something that may increase a pink flag with spam filters.

Testing instruments assess your electronic mail content material for components that may set off spam filters, equivalent to extreme capitalization, suspicious key phrases, or sure formatting points.

This ensures your electronic mail lands within the main inbox moderately than the spam folder, the place it’s extra more likely to be seen and engaged with by your recipients.

Email Subject Line Checker

The topic line is the very first thing recipients see, and it drastically influences open charges.

Email testing instruments consider your topic strains for size, relevance, and spammy phrases. They present suggestions to create compelling topic strains that encourage recipients to open your emails.

Email SMTP & Mail Server Testing

Before sending emails in bulk, it’s essential to check your SMTP (Simple Mail Transfer Protocol) settings and mail server configurations.

Email testing instruments can simulate the sending course of to examine for any points, making certain that your emails are despatched effectively and reliably.

1. MailTrap – Email Deliverability & Spam Testing

Mailtrap’s electronic mail preview perform operates by scrutinizing your HTML and CSS code, meticulously pinpointing any potential points it encounters.

MailTrap excels at figuring out widespread downside areas that often come up when emails are considered on fashionable purchasers equivalent to Gmail and Outlook.

Best Features of MailTrap

MailTrap’s standout function is its skill to securely take a look at and assess emails with out the chance of sending them to actual recipients.

Can be linked by means of an API or be used as an SMTP server.

Special BCC testing exhibits you all the e-mail addresses which can be BCC’ed, that are often hidden from the primary recipients.

500 to 10 million take a look at emails monthly

Weekly stories with invaluable comparability metrics.


MailTrap provides a bunch of pricing choice each for Email Testing & Email Sending.

Email Sending:

Email Testing

Mailtrap_Email-testing pricing

2. MailerCheck – Email Deliverability

MailerCheck is an expert electronic mail deliverability platform geared up with a variety of instruments to assist companies improve their electronic mail efficiency.

MailerCheck lets you analyze your electronic mail campaigns, identifies potential deliverability points, and provides detailed stories on the well being of your electronic mail checklist.

Best Features of MailerCheck

Bulk and single electronic mail verification, together with syntax checks, ensures an correct electronic mail checklist is correct.

Identifies potential spam traps and disposable electronic mail addresses to reinforce electronic mail deliverability.

Gain insights into electronic mail campaigns by means of reporting and analytics options.

Verifies the legitimacy of mail servers, making certain the emails attain their meant locations.

Detect catch-all servers to enhance electronic mail advertising precision.


MailerCheck provides a pay as you go choice for the Email verification function ranging from $10 per 1000 credit.

And the e-mail deliverability is priced as beneath,

Mailercheck pricing

3. Email on Acid – Email Client Preview + Spam Testing

Email on Acid is a well-liked alternative amongst entrepreneurs, builders, and massive gamers like Toyota, Hilton, and IBM as their go-to electronic mail testing device.

It is a fairly helpful platform for electronic mail advertising. What it does is be certain that your emails look good and work completely earlier than you ship them out.

Best Features of Email On Acid

Unlimited Email Previews for various units and platforms.

Spelling checker & Image Optimization.

Validate URLs and UTM checks

Spam filters and IP handle validation

Email template builder and group collaboration


Email On acid Pricing

4. GlockApps – Email Deliverability & Content Spam Testing

GlockApps serves as a device for testing inbox supply and spam filters, giving customers the liberty to resolve electronic mail deliverability points earlier than sending their emails.

It’s nice for recognizing potential issues in your electronic mail platform, content material, or area/IP status early on.

What’s even higher, it offers a preview of how numerous electronic mail suppliers categorize your emails, so you may observe enhancements as you handle recognized points.

Best Features of GlockApps

GlockApps provides DMARC analytics to successfully establish and handle any malicious components in your emails.

It serves as an all-in-one electronic mail supply device, that includes a Reputation Check that audits your IP handle and sending area in opposition to business blacklists.

GlockApps offers in-depth bounce analytics that will help you perceive and handle bounce charge points.

Ensure electronic mail safety with authentication checks for SPF, DKIM, and reverse DNS.

Benefit from evaluation instruments that study your emails for compatibility with Barracuda and SpamMurderer filters.


They supply two completely different pricing choices, the primary one is for DMARC Analytics and the second is for the Spam Test Credit Packs.

DMARC Analytics

Glockapps_ DMARC Analytics pricing

Spam Test Credit Packs

Glockapps_Spam test pricing

They supply one other choice to buy each of them as a bundle ranging from $59.

5. Litmus – Email Client Preview + Spam Testing

Litmus is the go-to platform for electronic mail advertising specialists, and it’s received all of the options to make your emails carry out. Even high universities like MIT, and Harvard use Litmus to ship electronic mail advertising campaigns to their potential college students.

From the second you begin crafting your electronic mail marketing campaign to the post-send evaluation, Litmus has your again. You can construct, take a look at, and collaborate on a ton of emails suddenly with Litmus.

Plus, they make it tremendous simple to create customized electronic mail experiences that scale up. That means you may flip extra of these electronic mail opens into conversions and income.

Best Features of Litmus

User-friendly interface for creating lovely emails

Advanced electronic mail analytics to examine how the emails are performing and whether or not they’re reaching the correct vacation spot or not.

Email preview of 100+ electronic mail purchasers

Integration with ESPs and different companies like Acoustic Campaign, Adobe Campaign Standard, HubSpot and so forth.


Litmus provides month-to-month and annual pricing ranging from $79

Litmus Pricing

6. HTML Email Check – Email HTML Preview & Validation

HTML Email Check is your one-stop answer for builders, providing a whole set of instruments to create, validate, and confirm your HTML emails. It contains immediate validation outcomes, a built-in HTML editor, a format viewer, and even means that you can ship take a look at emails straight.

Best Features of HTML Email Check

HTML & CSS validation for HTML markup, CSS formatting, client-specific tags, and styling.

Image, font, and hyperlink validation for higher electronic mail efficiency

Spam validation of electronic mail total content material with a comparability in opposition to a database of over 500 key phrase combos identified to intensify the chance of touchdown within the spam folder.

Visual tester to preview the emails throughout a number of platforms

Dark mode validation for customers preferring darkish mode for use.


HTML Email Check provides a versatile pricing plan based mostly on customers and month-to-month plans.

HTML email check pricing

7. CoSchedule Headline Analyzer – Email topic line testing

The CoSchedule Headline Analyzer stands as a preferred device for enhancing your headline and topic line crafting abilities. It evaluates your electronic mail topic strains based mostly on 4 essential features: phrase stability, headline sort, size, and sentiment.

What makes it efficient is its use of varied visible aids to grade your electronic mail topic strains and supply sensible options for enchancment.

Best Features of CoSchedule Headline Analyzer

Scrutinizing your language to establish and flag phrases that may cut back electronic mail open charges.

Assessing the emotional impression of your topic line, whether or not it conveys a constructive, adverse, or impartial sentiment, and highlighting phrases that evoke robust emotional responses.

Providing you with previews of how your topic line will seem throughout completely different electronic mail purchasers and on cell units.


The CoSchedule headline analyzer is a very free device so that you can use.

8. Send Check It – Email topic line testing

Send Check It is a invaluable and free electronic mail testing device designed to make sure that your topic strains are on level and efficient in capturing your recipients’ consideration.

It goes past a easy evaluation by providing full suggestions to reinforce the efficiency of your topic strains.

Best Features of Send Check It

Asks you to make your topic line extra scannable, making it simpler for recipients to know the message at a look.

Provides insights into the perfect topic line size, serving to you strike a stability between being concise and informative.

Suggests enhancements for higher readability, which is essential for participating your viewers.

Assesses the sentiment conveyed by your topic line, serving to you fine-tune it to evoke the specified emotional response.

Helps you establish and eradicate phrases or phrases that may set off spam filters, bettering electronic mail deliverability.


Send Check It is a very free device so that you can use.

9. Omnisend Subject Line Tester – Email topic line testing

Omnisend provides an distinctive electronic mail topic line testing device that means that you can put together compelling topic strains. And it ensures that your emails stand out and keep away from spam filters.

Best Features of Omnisend Subject Line Tester

Evaluates your topic strains based mostly on business greatest practices and benchmarks, offering insights to make them more practical.

Gives you speedy suggestions and various topic line options to reinforce the impression of your emails.

Compare your topic strains with these of your rivals to gauge your efficiency and uncover areas for enchancment.

You can achieve insights into topic line size, wording, scalability, and preview, permitting you to fine-tune your electronic mail topic strains for optimum outcomes.


Omnisend provides each free and premium variations of its topic line testing device. With the free model, you may examine as much as 500 emails, and you’ve got the pliability to improve your bundle every time your wants broaden.

10. Mail-Tester – Email Content Spam Testing

Mail-Tester, a free electronic mail testing device, might be your ally in gauging the spamminess of your emails and bettering their deliverability. It provides a simple means to make sure your emails attain customers’ inboxes as an alternative of their spam or junk folders.

Best Features of Mail-Tester

Gives a chosen electronic mail handle to ship your emails. It then completely scans your emails, assessing components like your message content material, mail server setup, and sending IP to find out their spamminess.

An in depth report outlining what’s well-configured and the place enhancements are wanted in your electronic mail setup, making it simpler to reinforce your electronic mail deliverability.

The consumer interface is designed for accessibility, making certain that even customers with out intensive technical information can navigate and profit from the device.

Spam Trap Removal helps establish spam lure emails in your lists, and Syntax Verifier, which detects and eliminates emails with invalid syntaxes.

Mail-Tester permits each handbook and automated electronic mail verification by way of API, making it adaptable to your particular wants.


Mail-Tester provides pricing ranging from $19 monthly for a single consumer, with the choice to discover its options by means of a free trial.

11. SendForensics – Email Spam Testing & Deliverability Tool

SendForensics stands as a complicated electronic mail deliverability answer, harnessing the ability of a number of AI insights to evaluate your emails’ skill to succeed in your recipient’s inbox.

SendForensics evaluations your emails very well and provides optimization options to enhance your electronic mail content material’s effectiveness.

With a concentrate on measuring electronic mail high quality, this device scans your emails in opposition to international filtering methods and ISPs. With this you may control your electronic mail status by monitoring blacklists and whitelists, finally permitting you to keep up constructive deliverability charges.

Best Features of SendForensics

Provides a preview of how your emails will seem throughout numerous electronic mail purchasers, making certain a constant {and professional} presentation.

Get a predictive rating that provides insights into the probability of your emails being efficiently delivered to the inbox.

Ensures that your electronic mail content material aligns with DMARC compliance, enhancing your electronic mail safety and trustworthiness.

Gain invaluable insights into your sending infrastructure and obtain suggestions for optimization.

Leverage AI-driven insights to enhance your electronic mail content material, sending infrastructure, and status.


SendForensics offers you a 14-day free trial that means that you can discover the device’s capabilities. And following is the pricing plan for this,

Sendforensics pricing

12. Socketlabs – Email SMTP & Mail Server Testing

SocketLabs is a cloud-based software program that makes sending advertising and transactional emails simple and dependable. It has a user-friendly dashboard and is all about making certain your messages get delivered.

Best Features of SocketLabs:

You can hold observe of your incoming emails and get summaries of what’s occurring with them.

It offers a dependable approach to ship emails for each advertising and transactional functions.

Create participating electronic mail campaigns utilizing templates, a drag-and-drop interface, customized branding, and fields.

Get clear visible stories on necessary metrics like bounce charges, complaints, opens, and clicks to see how your campaigns are performing.

SocketLabs provides a variety of APIs like reporting, injection, suppression, and advertising to adapt the platform to your small business wants. Plus, it has authentication instruments, optimizer, ISP administration, and whitelist choices to reinforce electronic mail deliverability, making certain your emails attain their locations.


Socketlabs provides pricing plans for each people who find themselves operating easy electronic mail advertising campaigns and customizable plans for enterprise businesses.


13. Mailosaur – Email & SMS Campaign Testing

Mailosaur is the go-to platform for companies looking for to streamline communication testing. It simplifies the method of capturing, testing, designing, and analyzing electronic mail and SMS messages, making certain that each message your small business sends meets your exact expectations.

Best Features of Mailosaur:

Create automated exams swiftly, overlaying essential communications like account notifications, alerts, promotional provides, and bulletins.

Gain an correct view of what your clients will expertise by capturing actual electronic mail shopper screenshots on numerous desktop and cell units.

Get a two-factor authentication, password resets, and personalization, guaranteeing service availability and consumer entry stay uninterrupted.

Safeguard your staging and growth environments from manufacturing, utilizing Mailosaur electronic mail servers to seize knowledge with out the chance of take a look at messages reaching actual clients.

Easy to maintain an in depth eye on message high quality and consistency to make sure that provides, promo codes, and customized content material constantly carry out as meant.


Mailosaur provides a fairly easy pricing plan,

Mailosaur pricing

14. MailAttain – Email Deliverability & Warm Up Tool

MailAttain is a invaluable electronic mail deliverability answer that enhances the effectiveness of your electronic mail campaigns. It achieves this by combining an efficient email-warming device with a spam checker to spice up your sending status and total deliverability.

Best Features of MailAttain:

Email Spam Checker scans your electronic mail content material and infrastructure to detect any components that may set off spam filters.

Offers an automatic course of to step by step improve your electronic mail sending quantity, serving to you identify a constructive sending status.

Gain insights into sender scores and spam criticism charges throughout main electronic mail suppliers, permitting you to establish and handle deliverability points.

The intuitive dashboard offers real-time insights into your electronic mail warming standing, permitting you to foretell the locations of your marketing campaign emails.

Live blacklists and DNS checks hold you knowledgeable and proactive in sustaining a constructive sender status.


You get a primary month low cost in case you join and additional, you may scale up your plan accordingly.

Mailreach pricing

15. MailGenius – Email Deliverability & Spam Testing

Determine in case your emails would possibly set off spam filters with a fast and free spam and safety take a look at in below a minute utilizing MailGenius.

MailGenius is an appropriate alternative for entrepreneurs and companies coping with the fixed situation of their emails falling into the spam folder or worse not getting delivered in any respect. MailGenius is appropriate with all main electronic mail suppliers, making certain broad compatibility.

Best Features of MailGenius:

Receive customized directions to configure your area accurately, stopping unauthorized use and boosting electronic mail safety.

Check in case your server or area is listed on main blacklists, making certain your emails attain their meant locations.

Ensure that your electronic mail content material and topic strains meet the required standards to keep away from getting caught in spam filters, enhancing deliverability and open charge.

Verify in case your electronic mail message physique adheres to HTML greatest practices, creating skilled and error-free emails.

Identify any damaged hyperlinks in your emails, providing a seamless consumer expertise for recipients.


MailGenius is a very free device so that you can use in your electronic mail testing functions.


The 15 electronic mail testing instruments featured on this article might be very helpful for you in order for you the emails to be delivered to the correct place.

With their various vary of capabilities, they are going to provide help to to beat deliverability challenges, fine-tune electronic mail content material, and safeguard your sender status.

From the battle in opposition to spam filters to crafting compelling topic strains, these instruments supply indispensable options that cater to entrepreneurs, builders, and companies of all sizes.

Fatema Tuz Zohra Nabila

About Author

Fatema Tuz Zohra Nabila

Nabila is a product advertising supervisor at WPFunnels. She is a vivid storyteller and loves guiding folks on electronic mail advertising & gross sales funnel ways.