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Verify your Constant Contact audience before you send

Constant Contact stores contacts across lists, segments, and tags, and most imported rows count toward your account whether they ever engage or not. Verifying an export with Bounceless before you upload a file or hit send catches invalid addresses while they are still spreadsheet rows, not bounce events that already registered against your Constant Contact reputation.

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How it works

[01]Export your Constant Contact selectionOpen the Contacts page and select the contacts, list, or segment you want to check — or use the three-dot Export menu on a specific list from Lists and segments. Click Actions > Export selection (or Export from the list menu), choose the contact fields to include in the overlay, and click Export.
[02]Download the CSV or Excel fileWhen the export completes, open View import/export activity from the Contacts menu (three dots, upper right) and download the CSV or Excel file. Download links stay available for up to ten days or 101 exports, whichever comes first.
[03]Verify the file in BouncelessUpload the exported file to Bounceless as a bulk verification job. Every email address gets a confidence level, reason codes, and a Pre-Send Decision before you re-import anything.
[04]Re-import the clean contactsBack in Constant Contact, click Add Contacts > Upload from file, select your verified CSV or Excel file, map columns to standard headings like Email Address, assign the import to a list, and complete the upload. Constant Contact updates existing contacts when the email address matches.

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

When to run it

Pre-send list hygieneExport the list or segment tied to your next campaign, verify it in Bounceless, and re-import only send-decision addresses so invalid rows do not become bounce reports after the send goes out.
Cleaning a large migration batchConstant Contact accepts CSV files up to one million rows. Split oversized exports if needed, verify each batch in Bounceless, then import the cleaned files so your first Constant Contact send is not seeding suppressions.
Tag or segment maintenanceExport contacts filtered by email status or tag, verify the file, and re-import updates so inactive or invalid addresses get corrected before they skew engagement reporting.

Common questions

Does exporting contacts remove them from Constant Contact?

No. Constant Contact's export article states that exporting creates a backup copy without removing contacts from your account. Bounceless sits between export and re-import: you verify the backup file, then decide which rows to upload back or leave out — the platform still requires you to take any delete or unsubscribe actions yourself.

Do I need the Constant Contact API for this workflow?

No. The default path uses Upload from file and Export selection in the Contacts dashboard. Constant Contact does offer API import endpoints for developers, but this guide follows the CSV workflow documented in Help Center so marketing teams can run it without provisioning API credentials or writing integration code.

What if my export needs GDPR or CASL permission fields?

Constant Contact warns that permission status columns only appear in exports when Advanced Email Permissions are enabled before you export. Enable those permissions first if you rely on consent metadata, then export, verify deliverability in Bounceless separately, and re-import with the same field mappings Constant Contact expects.

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