Also known as: spam trap email, honeypot address
A spam trap is an email address that exists solely to catch senders with poor list-building and hygiene practices. Mailbox providers and anti-spam organizations plant these addresses so that anyone who emails them is flagged as someone who didn't get permission or doesn't clean their lists. Hitting a spam trap is one of the most damaging deliverability mistakes, because it signals to providers that you're a spammer — and the penalty to your sender reputation is severe.
There are two main kinds. Pristine traps are addresses never used by a real person and never opted in to anything — if you email one, you almost certainly scraped or bought the list, which is exactly what providers want to catch. Recycled traps are real addresses that were abandoned and later repurposed as traps; hitting these signals that your list is old and you don't remove inactive contacts. Both point to the same root causes: buying lists and failing to maintain hygiene.
You can't see spam traps — that's the point — so the only defense is good practice. Never buy or scrape lists, since those are riddled with traps. Build lists from legitimate, current sources, verify addresses, and remove contacts that go inactive or hard-bounce. Essentially, the same discipline that keeps bounce rate low keeps you clear of spam traps: fresh, verified, well-maintained lists.
A single spam-trap hit can undo months of careful sending by tanking your reputation. Avoiding them is one of the strongest arguments against ever buying a list and for treating list hygiene as ongoing maintenance, not a one-time task.
Your sender reputation takes a serious hit, because providers treat it as proof you're emailing without permission or not cleaning your lists. That can send your mail to spam for everyone and take weeks or months to recover from.
Never buy or scrape lists (they're full of traps), build lists from legitimate current sources, verify addresses, and remove inactive or hard-bounced contacts. You can't detect traps directly, so clean list practices are the only defense.
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