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Verify your MailerLite audience before you send

MailerLite bills around active subscribers and runs automations off the same contact record, so an invalid address can both waste a paid slot and trigger workflows on a mailbox that never existed. Exporting a segment, verifying it with Bounceless, and re-importing the clean file catches bad rows in CSV form before they become bounced or spam-complaint contacts.

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How it works

[01]Export your MailerLite subscribersGo to the Subscribers page, filter to Active subscribers or another status you want to check, select the rows (or use the column header menu to select all subscribers in the list), configure visible columns with Set columns, then click Actions and choose Export CSV or Export CSV for Excel.
[02]Verify the export in BouncelessUpload the exported CSV to Bounceless and start a bulk verification job. Each address receives a confidence level, reason codes, and a Pre-Send Decision: send, review, or suppress.
[03]Download the verified resultsWhen processing completes, download the results file and separate addresses by Pre-Send Decision so you know which rows to re-import and which to exclude from your next MailerLite upload.
[04]Re-import the clean subscribersOn the Subscribers page, click Add subscribers, choose Import from a CSV or TXT file, upload the send-decision file, map columns on the Import settings page, and finish the import. MailerLite updates existing subscribers when the email address matches instead of creating duplicates.

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

When to run it

Before a campaign or automation sendExport the group tied to your next campaign or automation, verify it in Bounceless, and re-import only send-decision rows so hard bounces and spam complaints do not spike on the first send after import.
Bulk field updates without adding bad addressesMailerLite supports re-importing the same email to update custom fields without duplicating subscribers. Verify the export first so the update pass refreshes real addresses instead of propagating typos across your account.
Migrating from another ESPMailerLite publishes migration guides from platforms like Mad Mimi and Mailchimp. Run any incoming CSV through Bounceless before Add subscribers so your MailerLite account starts with deliverable contacts, not a suppression backlog.

Common questions

Who can export subscribers in MailerLite?

MailerLite's export help states that only account administrators can export subscribers. If you do not see the Actions export options, ask your workspace admin to run the export or grant the appropriate role before you upload the file to Bounceless. Import permissions follow the same admin rules documented for Add subscribers.

Does MailerLite charge again when I re-import the same email?

MailerLite does not duplicate subscribers when you re-import an email address that already exists — the system updates the existing record with new field values from your file. That makes verify-then-re-import a safe hygiene loop, but it also means you should exclude suppress-decision addresses from the upload instead of re-adding them as active subscribers.

Can I export from a campaign report instead of Subscribers?

Yes. MailerLite lets you export opens, clicks, or other activity from a campaign report page using the same Export CSV actions. Export that activity file, verify it in Bounceless, and use the results to decide which engaged addresses still look deliverable before you clone them into a new group or re-import them elsewhere.

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