What's included and how does it work?

mailfloss covers all of your email verification needs in one powerful yet simple platform

Connect your email service provider

mailfloss works with your favourite email service providers

We support 35 of the most popular email service providers and we keep adding more.

One-time setup. It takes 60 seconds

All it takes is a few button clicks and you only have to do it once.

No developers needed

But we have a real-time API, as well. Techies only.

Spreadsheets, optional

You can upload spreadsheets or paste email addresses if you want. ūü§£ Our preference? Definitely our set and forget integrations.

Connect your ESP

"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
Set your preferences

"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

Set your frequency & cleaning preferences

Autofloss for automatic daily cleaning

Daily 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

Typo fixer

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!


Automatically delete invalid email addresses so they aren't clogging up your email list.


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

Auto-tagging and auto-update custom fields

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

mailfloss fixes typos automatically

"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 Nemtsev
Vadim Nemtsev Head of Marketing
mailfloss does the rest
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, delete, 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.