Reviews
mailfloss reviews & ratings from teams that automate list cleanup.
Real teams, real numbers. E-commerce brands, SaaS companies, newsletter operators, and agencies use mailfloss to quietly remove the bad addresses dragging down their campaigns.
5,000+
teams using mailfloss
60M+
typos fixed
8%
avg. bounce-rate drop
4.9/5
on Capterra
Case studies
How mailfloss customers actually use it.
Enterprise · HubSpot
Randstad USA
Demand generation team using HubSpot
“We were looking for an email verification service that could support enterprise level volume and tight integration with HubSpot, and frankly mailfloss was the only game in town.”
Brandon McDonald
Director, Demand Generation
Results
HubSpot
tight integration
Enterprise
level volume supported
Only
game in town for their workflow
Marketing education · Infusionsoft
NAMS
Marketing education team
“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.”
Jennifer Perdew
CMO, NAMS
Results
Set
and forget it
Every
single month
No
thinking required
Agency · Klaviyo
RevGrowth
Klaviyo email marketing agency
“You install it one time and for the life of your account you get a 2–3% increase in your leads. It automatically corrects typos — if someone misspells Gmail, it fixes it. That’s a huge additional source of revenue you were missing out on before.”
Dave Clabeaux
Founder, RevGrowth
Results
2–3%
increase in leads, for the life of the account
5–6
more leads a day at a ~$30 cost per lead
Once
set up — then runs on autopilot
How mailfloss helps
Every industry where email matters.
E-commerce
Clean welcome, abandoned-cart, and promo flows so revenue emails reach real buyers — not bots and typos.
SaaS
Keep trial, onboarding, and lifecycle emails landing in the inbox so activation and retention campaigns convert.
Newsletters
Protect sender reputation and open rates by removing dead and mistyped subscribers before every send.
Agencies
Auto-clean every client list across multiple ESP accounts — fewer bounces, better client results, less manual work.
Publishers
Keep large, fast-growing subscriber lists accurate so reader engagement and ad impressions hold up.
Non-profit
Reach more donors and supporters by clearing the invalid addresses that quietly drain campaign reach.
In their words
What people say after they switch.
Fred Owen
Business Owner
mailfloss was easy to set up and integrate with my email service provider. Just a few clicks and then I could let it run in the background and not worry about maintenance.
Vadim Nemtsev
Head of Marketing
It allowed us to weed out lots of bad emails and protect our sender score. It’s one of the best martech purchases you’ll ever make.
Nick James
Business Owner
No blacklists, all time low email bounce rate. We have tried other email verifiers. But nothing comes close to mailfloss.
Brandon McDonald
Director of Marketing
We needed enterprise level volume and tight integration with HubSpot, and frankly mailfloss was the only game in town.
Eugenia Brock
Email Marketing Specialist
This used to be a very tedious and time consuming process that I did manually. With no troubleshooting and very easy configuration, I have literally saved myself hours of work every single week.
Daniel Lorenzo
Email Marketing Specialist
Amazing software. I needed to clean up all of my database contacts and didn’t know the best way to do it. With mailfloss and the Brevo integration I did a big fix.
Watch a customer
Hear it from a mailfloss customer
Customer questions
Common questions.
Absolutely — we love hearing from customers. Reach out to support and we’ll work with you on the right format. We never publish anything without your sign-off.