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Suppression List Merger

Merge unsubscribes and bounces into one blocklist.

How it works

Merge unsubscribes and bounces into one blocklist

Paste multiple lists (separate with blank lines or ---) → click Merge suppressions → dedupe, normalize, and download a single CSV blocklist.

Or start from a real-life example

Upload a file

Results appear here after you click Merge suppressions.

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