Does Qualisend have a native Omnisend integration?

A native one-click connector is being rebuilt as part of our platform upgrade and will return. Today the supported path is the CSV loop - export from Omnisend, verify in Qualisend, then unsubscribe or delete the dead addresses - or verifying at signup through the API. Both work with any Omnisend plan.

Will cleaning my list lower my Omnisend bill?

It can. Omnisend counts your subscribed and non-subscribed contacts on your billing day, and only unsubscribed contacts are excluded - so dead never-mailed addresses sitting as non-subscribed contacts stay billable until you act. Moving your verified undeliverables to unsubscribed, or deleting them, is what reduces the count; automatic bounce handling only reaches addresses you've already sent to.

What's the difference between non-subscribed and unsubscribed in Omnisend?

Non-subscribed contacts never opted in but can still receive transactional automations, so Omnisend keeps them and bills for them. Unsubscribed contacts actively opted out, are excluded from sends, and are the one status not counted toward your bill. For cleaning purposes, unsubscribed is the "retired" state.

Should I unsubscribe or delete cleaned contacts?

Either one takes them off your billable count. Unsubscribing keeps the contact record, which stops a future import from silently re-adding a known-bad address as a fresh non-subscribed contact; deleting removes the record entirely. Unsubscribe is usually the safer default.

Can I verify addresses before they enter Omnisend?

Yes - it's the highest-leverage option. Verify at signup through the REST API (or a Zapier/Make/n8n flow) so typos and disposable addresses never become billable Omnisend contacts in the first place.

Native one-click sync: live

Keep your Omnisend audience clean, deliverable, and off your bill

Omnisend automatically unsubscribes hard bounces, but it can't judge an address it has never sent to - and on Omnisend those never-mailed invalids usually sit in your account as non-subscribed contacts that quietly count toward your bill. Qualisend closes that gap: export your audience, verify every address, and act on the dead ones before your first campaign hits them. Here's the workflow that works today, plus the API and no-code options.

Clean a list for free Read the Omnisend guide

Native connector

Connect Omnisend and clean it in place

Connect Omnisend with an API key and Qualisend verifies the lists you already have - right inside Omnisend, no export. Dead and risky addresses are suppressed or archived for you, every new subscriber is checked in real time, and you can re-verify on a schedule so the list never drifts back to dirty.

Prefer to work by hand, or verify at signup through your own stack? The CSV export → verify → reimport loop below and the REST API are fully supported too.

Connect Omnisend

Omnisend handles

What Omnisend cleans for you

Omnisend's native hygiene runs on automatic status changes. When an address hard-bounces, Omnisend marks it bounced and unsubscribes it - one of its automatic unsubscribe reasons - so it drops out of every future send; an address that keeps soft-bouncing is suppressed after repeated failed attempts. Crucially, Omnisend separates unsubscribed (actively opted out) from non-subscribed (never opted in), and it does not automatically remove or suppress non-subscribed contacts. For addresses Omnisend has actually mailed, that's dependable automatic hygiene.

The gap it leaves

What it can't catch

The catch is that every one of those mechanisms is reactive - it needs a send and a failure to fire. Never-mailed invalids from imports and signup forms, disposable addresses, role addresses, and decayed mailboxes all look healthy until your first campaign hits them, which is exactly when a mailbox provider forms its first impression of your domain. On Omnisend the import is the sharpest case: a list arrives with its bounce history stripped, so addresses that were already failing elsewhere look brand new - and they land in your account as non-subscribed contacts that count toward your billable total from day one, before a single send has proved them dead.

Why a clean Omnisend list matters

On Omnisend the stakes are twofold, because of how Omnisend bills. It counts your billable contacts on each billing day as your subscribed plus non-subscribed contacts - non-subscribed count because they can still receive transactional automations like order confirmations. The only status excluded from billing is unsubscribed. So a dead never-mailed address imported as a non-subscribed contact costs you every billing cycle until you act on it, while it also drags down the engagement rates Omnisend's own reputation model, and Gmail and Yahoo's 2024 sender rules, judge you on. Cleaning before a send does two jobs at once: it can move you under a plan tier, and it protects the inbox placement of the automations that actually convert.

Prefer CSV or the API? Here's the manual path

The native connector is the fastest route, but the CSV loop works on any Omnisend plan: export from Omnisend, verify in Qualisend, and act on the results.

Export your audience from Omnisend

Open Audience, filter to the segment you want to clean (or export the whole audience for a full maintenance pass), and export it to CSV.

Verify the file in Qualisend

Upload the CSV to Qualisend bulk cleaning - up to 1,000,000 addresses, duplicates charged once - or paste addresses directly. The free plan's 100 credits cover a first sample.

Read the results

Every address returns deliverable, risky, undeliverable, or unknown with a reason code and sub-flags (catch-all, disposable, role, full mailbox), plus the MX provider and probe detail as evidence. Download the cleaned CSV.

Retire the undeliverables in Omnisend

Filter your results to undeliverable, then unsubscribe those contacts - which stops sends and removes them from your billable count, since unsubscribed is the one status Omnisend doesn't bill for - or delete them outright. Don't wait for the bounce to prove what verification already showed.

Or automate it at signup

Prefer to keep junk out from the start? Verify at the point of capture with the Qualisend REST API (scoped keys, rate limits, webhooks), or wire a no-code flow through Zapier, Make, or n8n so new Omnisend signups are checked before they ever become billable non-subscribed or subscribed contacts.

What Qualisend flags on every address

Never-mailed invalid addresses that would hard-bounce on your next Omnisend campaign
Disposable / throwaway domains accepted at signup and built to expire
Role addresses (info@, support@) that skew engagement-judged automations
Catch-all domains, flagged so you can segment and throttle them
A 0-100 confidence score and machine-readable reason code for every address

Native connector status

The native Omnisend connector is live - connect it in Qualisend under Integrations and clean your list without a single CSV. New contacts are verified automatically, and you can re-verify on a schedule.

What to do with each result

Every address comes back with a verdict and sub-flags. Here's the action that keeps your Omnisend list clean without throwing away contacts you can still reach.

deliverableKeep sending as normal.

deliverable + role flagKeep for transactional content; exclude from engagement-judged automations.

risky + catch-all flagMove to a dedicated segment and throttle your sends.

risky + disposable flagUnsubscribe or delete - the inbox was built to expire.

unknownKeep and re-verify next clean - usually greylisting or rate-limiting, not a verdict on the mailbox.

undeliverableUnsubscribe (which also takes them off your bill) or delete; don't wait for the bounce to prove it.

Omnisend verification FAQ

Clean your Omnisend list in minutes

Start free with 100 credits that never expire - no card required. Connect, verify, and protect your next campaign.

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