mailflossHubSpot email verification, on autopilot.
Connect mailfloss to HubSpot and we'll quietly catch the typos, bounces, and dead addresses dragging down your sender reputation across every leads and contacts segment you send to.
HubSpot Marketing Hub prices by marketing contacts, so every dead or mistyped address you keep is one you pay for each month.
How do I remove invalid emails from HubSpot automatically?
Connect mailfloss to HubSpot and it removes invalid emails automatically — no list exports. It verifies new contacts in real time, re-checks existing contacts on a schedule, and fixes typos like gmial.com instead of deleting a good contact. You choose what happens to an address that fails: delete it, unsubscribe it, tag it, update a property, or hold it for manual review. Invalid addresses are caught before they hard bounce.
Three clicks. Then it just runs.
Manual cleanup vs mailfloss for HubSpot.
Doing this yourself in HubSpot means exporting, checking, and importing over and over. Here is what changes when mailfloss is connected directly.
What happens if you never clean your HubSpot lists?
HubSpot is a CRM, not just a newsletter tool — so dirty data costs you in more places than bounces.
mailfloss fits the way HubSpot teams clean lists.
Same autopilot cleanup, tuned for your HubSpot CRMs.
Typo Fixer
Recognizes common typo patterns and helps recover typoed subscribers before good contacts are silently lost.
Instafloss
Protects signup flows in real time where they enter your marketing system, so invalid, disposable, and risky addresses are caught early.
Autofloss
Runs daily against new HubSpot contacts and applies your cleanup rules without another CSV export.
Decay Protection
Re-verifies older HubSpot contacts on a schedule, catching addresses that went bad after they joined.
Custom Keep & Remove Rules
Whitelist VIPs, blacklist domains, and tune removal behavior for each HubSpot connection.
Auto-Actions
Choose the cleanup outcome you want: review first, clean automatically, update fields, or notify another workflow when attention is needed.
What changes when mailfloss watches your HubSpot list.
My integration is with HubSpot and I appreciate the custom properties for list segment and suppression control, the automated list cleaning, and the consistent release of new, valuable features like typo fix.
Want to go deeper? Learn how to reduce spam signups in HubSpot before bots and fake addresses ever reach your list, or browse the best HubSpot integrations for keeping the rest of your marketing stack clean.
Evaluating HubSpot itself? Read Braze vs HubSpot, Constant Contact vs HubSpot, and Iterable vs HubSpot.
Developers can verify addresses in real time with the mailfloss email verification API; every plan is on the mailfloss pricing page, and email decay protection explains why a clean list decays without ongoing cleanup.
Comparing verifiers before you connect? See ZeroBounce alternatives and NeverBounce alternatives.
Common questions.
Sources
“contacts who have globally bounced (i.e. hard bounced in three or more HubSpot accounts) will not appear in segments or filters of hard bounced contacts.”
HubSpot’s own removal path is a segment you build, review, and delete by hand — and by its own documentation that segment cannot show you every bad address. mailfloss verifies each contact independently of HubSpot’s bounce history, so the ones its filters hide are still caught.
“Only marketing contacts count toward your contact tier and impact the cost of your subscription.”
Every undeliverable address you keep as a marketing contact is billable. Setting them to non-marketing, or removing them, is a line on the invoice — not only a deliverability change.