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Clean your email list faster and reach the inbox using MailerCheck

Gediminas Andrijaitis Gediminas Andrijaitis
· 8 min read · Updates · Jun 23, 2022
Milda, People Experience

Newsflash: We all attract invalid emails to our subscriber lists. These addresses are bad news, but you now have a secret weapon that eliminates those dangerous emails!

The best way to identify and remove invalid emails is to use email validation tools like MailerCheck, which can improve your deliverability rate by up to 98%. And starting today, you can access MailerCheck within your MailerLite account by using single-sign-on (SSO).

Here’s the scoop on MailerCheck!

MailerCheck is an email verification tool that checks your email lists for a variety of issues so you can remove invalid emails. The end benefit is higher deliverability and a healthy email server reputation.

If you are a MailerLite user, you’ll notice the design of MailerCheck looks familiar. That’s because MailerCheck is the sister product of MailerLite and was designed to work seamlessly with MailerLite.

Screenshot of MailerLite recipients

With the recent design upgrades and single-sign-on, all the most important MailerCheck features are accessible in a few clicks, including the integrations and API. You can clean your subscriber list in 3 quick steps:

Step 1: Upload your email list.

Step 2: MailerCheck cleans and analyzes while you grab a coffee.

Step 3: See which email addresses are good, which need to be organized into separate lists, and which should be removed.


We’ve written extensively on the importance of verifying emails to improve deliverability and protect your sender reputation. At MailerLite, we recommend that you verify your email lists every few months so that you can maintain and improve deliverability

The bottom line is that you need to clean your email list periodically to ensure you’re sending it to real people.

Email list verification can be fast and easy. You shouldn’t have to spend time navigating through up-sells and other add-ons that distract you from your main objective: To quickly and accurately verify your email list so you can move on with your life.

MailerCheck was designed to give you an easy-to-use solution that cleans your list without any extra hassle. And the list-cleaning experience just became even more seamless with MailerLite’s single-sign-on!

Try MailerCheck for free

Sign up for MailerCheck and enjoy the same exceptional 24/7 Customer Support you get with MailerLite. (No credit card needed).

Try free

Existing MailerLite users can now access MailerCheck with a few clicks. It doesn’t matter if you have an existing MailerCheck account or you need to create a new account.

After you log in to your MailerLite account, look for the new Dashboard icon (with 4 squares) in the top-right corner. Click on the icon and you would be redirected to MailerLite’s single sign-on page. 

SSO button on MailerLite dashboard

Click on the MailerCheck box.

MailerCheck box included on the MailerLite SSO page

If you don’t have a MailerCheck account, you will be prompted to enter your MailerLite password. A new MailerCheck account will be created using these credentials.

Create a new MailerCheck account

If you have an existing account, you will be prompted to enter your MailerCheck password. Once entered, your MailerLite and MailerCheck accounts will be connected.

Connecting an existing MailerCheck account

Once you connect, you will be directed to MailerCheck. While you are there, go ahead and give it a try. To go back to MailerLite, use the same Dashboard icon. You can access both MailerLite and MailerCheck from your single-sign-on dashboard.

Example of MailerCheck dashboard

Most email verification tools check your subscriber addresses and that’s it. But the team behind MailerLite wanted to create a tool that added more value by also checking your email content to see if it would land in the inbox.

We are happy to introduce Email Insights & Inbox Placement! Two MailerCheck features that you have to check out.

You can protect your sender reputation and boost deliverability by testing email content before you hit send. The Email Insights feature flags spam words, broken links and blocklists so your emails avoid spam folders and reach the inbox.  

Email insights results table in MailerCheck

Email Insights conducts 6 analyses that deliver new insight into your email practices.

  1. Spam filter test: Uncover email deliverability issues with SpamAssassin.

  2. HTML validation: Identify poorly-formed tags and CSS in HTML emails.

  3. Content check: Highlight spam-like words and unusual formatting.

  4. Links and images: Fix broken links and missing attributes for files.

  5. Sender authentication: Verify SPF, DKIM, and DMARC records are correct.

  6. IP address blocklist: Check if your sending domain is on a blocklist.

Have you noticed that email providers like Gmail, Outlook, and Yahoo deliver your emails differently? Sometimes the same email will reach the inbox on Yahoo, but hit spam on Outlook.  What if you could predict deliverability before you send?

Inbox Placement analyzes your email campaigns to predict if they will arrive in the inbox, the junk folder, or if they will even be delivered at all. After running an analysis, you can use the insights to revise your emails.

Example of Inbox Placement results in MailerCheck

This type of deliverability monitoring is another tool you can use to ensure your emails are reaching the primary inbox. With Inbox Placement, you can:

  • Anticipate where emails will land

  • Learn where emails appear in Gmail: Primary, Social, Promotions, Updates or Forums tabs 

  • Optimize emails for deliverability by making the necessary email content changes

Email marketing is the most effective marketing channel in your arsenal. This is true! But the reality is that you have to put in a lot of hard work to make your email marketing successful. 

You need to spend a lot of time building your subscriber list and creating engaging content month after month. The last thing you need is poor deliverability due to dirty email lists. 

MailerCheck was built so you can take control of your deliverability with just a few clicks. 

The best way to Keep it Lite when it comes to email list hygiene is to Keep it Clean!

Gediminas Andrijaitis
Gediminas Andrijaitis
I’m Gediminas, CPO at MailerLite (not to be confused with C3PO from Star Wars). I work across all departments to ensure MailerLite is always working and helping you create the best email experience possible. The only thing I love more than building products is riding motorcycles—really, really fast.