mailfloss is the alternative to TheChecker you've been looking for

Are you looking for a TheChecker alternative? Choosing the best email verification service for you and your business is easier than you think.

Take a look at what we offer, and the choice is obvious when you compare TheChecker to mailfloss.

Have a look at this handy comparison between mailfloss and TheChecker. You’ll see that mailfloss is not only affordable, accurate, fast, and easy-to-use, but also completely automated, always working for you, and extremely powerful.

TheChecker vs mailfloss for email verification

side by side comparison



Price per 10000 email verifications



60 second one-time setup

Automatic daily verification

One-click manual cleanup

Automatic unsubscribe

Automatic delete

Automatic tagging

Decay protection


maifloss works for you and removes fake emails before they become a problem.

When you connect mailfloss to your favourite email service provider, we scan for invalid email addresses and remove them every single day, increasing your email deliverability and getting more of your emails into the priority inbox.

Setup in 60 seconds

All it takes is a few button clicks and you only have to do it once. No developers needed and no more cumbersome spreadsheets.

Works with your favourite email service providers

We support 15 of the most popular email service providers and we keep adding more.

Automatically delete, unsubscribe, or update tags and custom fields

You have powerful options at your fingertips. And you're in complete control of what you want mailfloss to do.

Our satisfaction guarantee

There's no commitment and no contracts. If you don't see an improvement in your email deliverability in the first 30 days cancel and we'll refund your money.

Connect your ESP

Try mailfloss today

Start cleaning your email list in the next 60 seconds.

Connect your email service provider to mailfloss, set your preferences, and let mailfloss do the rest. You can be up and running in 60 seconds flat with no technical knowledge or developers. From that point on, your emails stay validated and you can move on to more important things, like focusing on your business and email marketing campaigns.

Get Started

Trusted by people from busy businesses across industries


What our customers are saying

mailfloss is literally the only piece of software that I use every single month that I don't even have to think about and I love that, because it's totally set and forget it.

Jen Perdew
Jen Perdew CMO NAMS

This used to a very tedious and time consuming process that I did manually. With virtually no troubleshooting and very easy configuration, I have literally saved myself hours of work every single week.

Eugenia Brock
Eugenia Brock Email Marketing Specialist Tax Pro Marketer