New accounts get 1,000 free credits.Start for free →

GitHubSign up
Campaign Monitor logo

Integration

Verify your Campaign Monitor audience before you send

Campaign Monitor tracks subscribers per list with Active, Unsubscribed, and Bounced states, but a bounced address only appears after a send has already failed against your domain. Verifying a list export with Bounceless before you import or email catches invalid and risky addresses while they are still rows in a CSV, not complaints logged after a campaign goes out.

Start for freeQuickstart

How it works

[01]Export your Campaign Monitor listIn Campaign Monitor, open Lists & subscribers and select the list you want to check. Click the overflow menu (three dots) in the top right, choose Export list, pick Active Subscribers or All Subscribers, select CSV as the file type, choose the subscriber fields to include, and click Export subscribers to download the file.
[02]Verify the export in BouncelessUpload the exported CSV to Bounceless and run a bulk verification job. Every address gets a confidence level, reason codes, and a Pre-Send Decision: send, review, or suppress.
[03]Download the verified resultsWhen the job finishes, download the results file. Filter or sort by Pre-Send Decision so you can separate addresses worth keeping from ones to remove before they re-enter a send.
[04]Re-import the clean subscribersBack in Campaign Monitor, import the send-decision addresses into the same list using the standard subscriber import flow. Map the email column correctly and skip creating duplicate custom fields for system values like Date added that Campaign Monitor already tracks internally.

Steps are sourced from Campaign Monitor's official documentation (reference) and have not yet been walked on a live Campaign Monitor account by a Bounceless team member — treat exact menu labels as indicative until this note is removed.

When to run it

Before a scheduled campaignExport the list segment you are about to email, verify it in Bounceless, and re-import only the send-decision rows so hard bounces do not hit your sender reputation on the first send after a long pause.
After merging legacy listsCampaign Monitor recommends exporting All Subscribers with all fields before merging lists manually. Run that combined export through Bounceless first so duplicates and dead addresses do not inflate the master list you import back.
Migrating subscribers into Campaign MonitorVerify a partner or CRM CSV with Bounceless before your first Campaign Monitor import, matching the platform guidance to export unsubscribes and bounces from the old ESP and add them to suppression before importing active subscribers.

Common questions

Does Campaign Monitor already remove bounced subscribers automatically?

Campaign Monitor marks addresses as Bounced after a failed delivery, and its migration docs recommend exporting those bounces into a suppression list before importing fresh subscribers. That protection is reactive — the bounce already happened. Bounceless checks addresses before you send or import, so fewer rows ever reach the Bounced state in the first place.

Do I need Campaign Monitor API access for this workflow?

No. This guide uses the dashboard export and import flows documented in Campaign Monitor Help. You export a list as CSV, verify it in Bounceless, then re-import the cleaned file through the same UI your team already uses for list maintenance — no API keys or custom integration code required on either side.

Can I export just a segment instead of the full list?

Yes. Campaign Monitor lets you build segments and export them with the Export segment action next to the segment search box. Export that segment CSV, verify it in Bounceless, and re-import the clean rows into the parent list before a targeted send instead of cleaning the entire list at once.

[ 06 / 06 ]GET STARTED
[ SEND ]

Spot risky contacts before your next send, not after

Test your list on 1,000 free credits: no card, no commitment, same engine as the playground above.

Start for freeTalk to us