What is a spam trap and how to avoid one
A spam trap is an email address used by mailbox providers and blocklists to catch senders with poor list practices. There is no real person behind it, so any mail it receives signals that you are not sending to a properly permissioned, maintained list. Hitting them can quietly wreck your deliverability.
Two kinds of traps
- Pristine traps - addresses created only to catch spammers; they were never valid, so any mail means you scraped or guessed addresses.
- Recycled traps - once-real addresses that were abandoned and later reactivated as traps. These reveal that your list is old and not cleaned.
How traps get onto a list
Buying or scraping lists, using "guessed" addresses (like firstname@company.com), and never removing long-inactive contacts are the main ways. A single pristine trap can get you blocklisted.
Catch risky addresses before they catch you
Mailcheq flags disposable and clearly invalid addresses and checks live SMTP - free, in your browser.
Verify an address →How to avoid them
- Never buy or scrape email lists.
- Use confirmed opt-in so only real, willing people join.
- Verify your list regularly and remove invalid addresses - see our list hygiene checklist.
- Prune contacts who have not engaged in 6-12 months, before they can turn into recycled traps.
No verifier can label a hidden pristine trap for certain, but keeping your list permissioned and clean is what keeps traps out in the first place - and protects your bounce rate and reputation.
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