Should I remove risky addresses from my list?
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Yes. But the right action depends on what kind of risk you're looking at, because different risk categories require different handling.
Remove immediately (no exceptions):
- Invalid and hard-bounced addresses: These can't receive email. They damage your bounce rate and your reputation every time they appear in a send. Suppress them immediately after the first bounce.
- Toxic and trap-risk addresses: Addresses flagged as spam trap adjacent, known abuse addresses, or addresses matching patterns associated with organized abuse networks. Sending to even one confirmed spam trap can trigger blocklisting. The risk isn't proportional to any potential benefit.
- Unsubscribes: Legal requirement in most jurisdictions. No exceptions.
- Spam complainers: Remove and suppress permanently. They've already flagged you once.
Remove after monitoring:
- Disposable domains: These expire quickly. If they haven't bounced yet, they will. Suppress proactively if your validation tool flags them.
- Dead or parked domains: Addresses at domains that no longer exist or are parked. Hard bounce waiting to happen. Remove before the next send.
- Long-term non-engagers: These aren't toxic, but keeping them indefinitely is a slow reputation drain. Run a re-engagement campaign, then suppress anyone who still doesn't respond after 1-2 attempts.
Monitor but don't remove yet:
- Catch-all domains: The server accepts everything. You don't know if the specific address is valid. Watch for bounces and engagement before making a removal decision.
The common mistake is treating all "risky" addresses the same. Removing a catch-all too aggressively costs you valid subscribers. Not removing a confirmed spam trap costs you your reputation. The risk vs engagement tradeoff matters, but not when the risk is truly toxic.
If you're not sure which category your risky addresses fall into, a validation report will categorize them for you. Our list cleaning service surfaces the categories explicitly so you can make informed decisions rather than guessing.
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