Does Qualisend have a native Sendlane integration?

Yes. The native Sendlane connector is live — connect Sendlane directly in Qualisend and clean your audiences in place: verify existing contacts and write the results back as suppress, archive, or tag, verify new contacts in real time, and schedule recurring re-cleans. It's the fastest path. The CSV loop (export, verify, reimport) and the REST API remain available as the manual path.

How many addresses can I verify at once?

Bulk cleaning handles up to 1,000,000 addresses per job with live progress, and duplicates are charged once. The free plan includes 100 one-time credits that never expire — enough for a first sample.

Can I verify addresses before they enter Sendlane?

Yes — it's the highest-leverage option. The native connector verifies new contacts in real time, or you can verify at signup and checkout through the REST API (or a Zapier/Make/n8n flow) so typos and disposable addresses never enter Sendlane, never reach a send, and never count toward your active contact total.

Will cleaning my list lower my Sendlane bill?

It can. Sendlane bills on active contacts, so deleting the undeliverable and disposable addresses you'll never reach again removes them from your billable total and can drop you under a pricing tier. Verifying before an import — or in real time through the connector — keeps that junk off your count from the start.

Should I suppress or delete cleaned contacts?

Suppressing stops every campaign and flow while keeping the contact record, which prevents a future import from silently re-adding a known-bad address. Deleting removes the contact entirely and is what actually takes it off your active, billable count. Suppress when you want a permanent block, delete when you want the address off your bill — or verify before import to avoid the trade-off.

Native one-click sync — live

Keep your Sendlane contacts clean and deliverable

Sendlane suppresses a contact the moment it hard-bounces and stops sending to it, so it reacts fast to a bad address — but it can't judge an address it has never emailed, and those never-mailed invalids from imports and signup forms are what quietly erode your deliverability. Qualisend closes that gap. Connect Sendlane directly with our native connector and clean your audiences in place, or verify at the point of capture with the REST API so junk never reaches a send.

Clean a list for free Read the Sendlane guide

Native connector

Connect Sendlane and clean it in place

Connect Sendlane with an API key and Qualisend verifies the lists you already have — right inside Sendlane, 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 Sendlane

Sendlane handles

What Sendlane cleans for you

Sendlane's native hygiene runs on contact status and its suppression list. When an address hard-bounces, Sendlane flags the contact and adds it to the account's suppression list, so it receives no further campaigns or automation emails; repeated soft bounces and spam complaints feed the same suppression logic. Suppression isn't deletion — a suppressed contact stays in your account, and Sendlane simply stops mailing it across every audience. For addresses Sendlane has actually sent to, that's reliable 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 bounce to fire. Never-mailed invalids from imports and signup forms, disposable addresses accepted at checkout, role addresses, catch-all domains, and mailboxes that have decayed since they opted in all look active until your first campaign proves otherwise — which is exactly when a mailbox provider forms its first impression of your domain. An imported list is the sharpest case: it arrives with its bounce history stripped, so addresses that were already failing on another platform look brand new to Sendlane.

Why a clean Sendlane list matters

On Sendlane the stakes are double, because Sendlane bills on your active contact count. Every dead address is a line item on your invoice as well as a drag on deliverability — undeliverable and disposable contacts inflate your billable total while pulling down the engagement rates Sendlane's reputation model, and Gmail and Yahoo's 2024 bulk-sender rules, judge you on. Those rules hold high-volume senders to a spam-complaint ceiling and expect a low bounce rate, and one campaign blasted at an unverified import can breach both. Cleaning before the send does two jobs at once: it can drop you under a pricing tier, and it protects the inbox placement of the campaigns and flows that actually drive revenue.

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

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

Export your audience from Sendlane

Open Audiences, select the list you want to clean (or build a segment first for a targeted maintenance clean), and export the contacts 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 that never expire 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 SMTP probe detail as evidence. Download the cleaned CSV.

Retire the undeliverables in Sendlane

Filter your results to undeliverable, then act on those contacts in Sendlane: add them to the account's suppression list to stop every campaign and flow, or delete them to take them off your billable active count. Tag the catch-all and role addresses so you can segment them rather than mail them blind.

Or automate it at signup

Prefer to keep junk out from the start? Connect Sendlane with the native Qualisend connector to verify new contacts in real time and schedule recurring re-cleans in place, or verify at the point of capture with the REST API (scoped keys, rate limits, webhooks) or a Zapier, Make, or n8n flow — so a typo or disposable address never reaches a send or your active contact count.

What Qualisend flags on every address

Never-mailed invalid addresses that would hard-bounce on your next campaign and land the contact on Sendlane's suppression list
Disposable / throwaway domains built to expire
Role addresses (info@, support@) that skew engagement-judged flows
Catch-all domains, flagged so you can tag them into a dedicated segment and throttle
A 0–100 confidence score and machine-readable reason code for every address

Native connector status

The native Sendlane 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 Sendlane list clean without throwing away contacts you can still reach.

deliverableKeep sending as normal.

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

risky + catch-all flagTag into a dedicated segment and throttle your sends.

risky + disposable flagSuppress or delete — the inbox was built to expire.

unknownKeep active and re-verify next clean — usually greylisting, not a verdict on the mailbox.

undeliverableSuppress via the suppression list, or delete to clear it from your billable count; don't wait for the bounce to prove it.

Sendlane verification FAQ

Clean your Sendlane 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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