Klaviyo Email Verification Made Easy

Automatically Remove Invalid Email Addresses Before They Become a Problem

Connect Klaviyo with mailfloss and get the best no-code, set and forget email verifier for Klaviyo there is. mailfloss automatically removes invalid email addresses in real-time so the emails you send get in front of more ideal customers

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Free 7-day trial Easy setup Money-back guarantee

Trusted by people from busy businesses across industries

Fake emails in your list hurt your business.

Klaviyo is an email marketing platform. Powered by data, built for ecommerce and web businesses.

Before sending emails to your hard-earned list, make sure you keep the list clean for maximum benefits and ROI.

When you send emails to fake email addresses you get penalized. That means more of your emails end up in spam and less in the inbox of your real customers.

“This is a truly no-brainer app for Infusionsoft users. It’s just getting rid of all the junk on our lists!”

Marc WayshakAuthor

★★★★★

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

When you connect mailfloss to Klaviyo, we scan for invalid email addresses and remove them in real-time, increasing your email deliverability and getting more of your emails into the priority inbox.

We even fix typos of popular email services automatically

Email services like Gmail, Hotmail, Yahoo, and AOL frequently get misspelled. mailfloss fixes these email address typos and syncs them with Klaviyo automatically, and in real-time. You don’t have to lift a finger.

mailfloss is the only Klaviyo email verifier that has this ability, and this feature alone pays for the subscription itself many times over for many of our Klaviyo users.

Start you free trial

Free 7-day trial Easy setup Money-back guarantee

“mailfloss found a bunch of email addresses that were dragging my email deliverability down. The integration with my email provider allowed me to purge those emails in moments. mailfloss made the process painless!“

Adam ConnellBlogger

Get up and running in 3 easy steps…

Step 1

Connect Klaviyo in only a few clicks. You only have to do this once.

Step 2

Set some options to your preference. You’re in complete control.

Step 3

mailfloss works for you daily and automatically removes bad emails.

Connect Klaviyo in a few clicks

Setup in 60 seconds

All it takes is a few button clicks and you only have to do it once. No developers, Zapier, or spreadsheets needed.

Prevent hard bounces in real-time

mailfloss is the only Klaviyo email verifier that can prevent bounces in real-time.

Automatically unsubscribe or update 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.

“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 BrockEmail Marketing Specialist

★★★★★

“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 PerdewCMO

★★★★★

Set your frequency & cleaning preferences

Superfloss for real-time bounce protection

Real-time cleanup so you don’t have to worry about invalid emails entering your database. That means more of your emails end up in the inbox of your real subscribers.

Prevent your email lists from going stale

2.1% of emails go stale every month, due to things such as job turnover and address abandonment. Decay protection protects your list from decaying by finding these decayed email addresses every single month.

How hard do you want to floss?

Choose how hard you want to floss. We recommend Medium for the best cleaning, but you are in charge.

Choose what you want to do with the invalid ones

Fix typos automatically

Popular email services such as Gmail, Yahoo, Aol, and Hotmail are frequently misspelled. mailfloss fixes these typos automatically that would have otherwise been lost. Nice!

Auto-unsubscribe

Automatically unsubscribe invalid email addresses so they won’t receive emails and hurt your reputation.

Auto-update custom fields

Automatically update custom fields of invalid email addresses. Use this data in automations, segmenting, and reporting.

“Even not being a MOPS pro, I was able to quickly and easily install this app. It allowed us to weed out lots of bad emails of all kinds, keep our dbase clean, get great results out of our campaigns, and protect our sender score to avoid being blackballed by ESPs and target company servers. It’s one of the best martech purchases you’ll ever make. Highly recommend it.”

Vadim NemtsevHead of Marketing

★★★★★

Here’s what happens when people start using mailfloss

I started using mailfloss on one of my lists and to my pleasant surprise open rates increased on average by 4%! The ease of use is awesome, just set it up and forget it!

Fred OwenOwner Win with Fred

As soon as I started to floss my emails each day my domain and IP address reputation in Google Postmaster tools quickly started to climb back to high once again.

Nick JamesOwner Internet Marketing Training Club

Start your free trial

Free 7-day trial Easy setup Money-back guarantee

Reporting, analytics, and other goodies

Review results first in manual mode

In our manual mode, results will display in the app for you to review. From there you can decide what to do with them such as tag, unsubscribe, and fix them. You are in control.

Reports emailed to you

Receive a CSV with the results including status, category, suggestions, and more.

Detailed analytics and stats

View analytics for a breakdown of your results, with search, sort, and filtering options.

Connect to thousands of other apps

Connect mailfloss to the Zapier ecosystem to connect with thousands of other apps.

Get started in 60 seconds

Start cleaning emails on autopilot

Free 7-day trial Easy setup Money-back guarantee