Spam Trap
Also known as: Spamtrap, Honey Pot, Spam Honeypot
A spam trap is an email address operated by an anti-spam organisation, mailbox provider, or blocklist maintainer that is monitored to identify senders with poor list-hygiene practices. There are two main types: pristine traps (never belonged to a real user; only ever scraped or guessed) and recycled traps (formerly real addresses, abandoned, then reactivated as traps).
Spam traps are the primary mechanism by which blocklists (Spamhaus, SORBS, SURBL, others) identify spam senders. Sending to one trap once is forgiven. Sending to multiple traps repeatedly results in domain or IP blocklisting that takes weeks to recover from.
Pristine traps
Addresses created by an anti-spam organisation that were never advertised, never subscribed to anything, and exist only on monitored mail servers. Any send to a pristine trap is evidence that the sender scraped or guessed the address, typically using leaked database lists or address-pattern generators.
Recycled traps
Addresses that used to belong to a real user, were abandoned, and after sitting unused for 12+ months were reactivated by the mailbox provider as a trap. Sending to recycled traps indicates the sender is not cleaning their list of unengaged subscribers.
How to avoid them
- Never buy or scrape lists. Pristine traps live there.
- Verify every list before importing using NeverBounce, ZeroBounce, or Hunter Verifier.
- Suppress addresses that haven't engaged in 180 days; they become recycled-trap candidates.
- Honor unsubscribes immediately, recycled traps often come from forgotten old subscribers who tried to unsubscribe and the sender ignored.
- Use double opt-in for marketing lists.
Frequently asked questions
How do I know if I hit a spam trap?+
Aggregate DMARC reports (the rua= tag) and blocklist monitors (MxToolbox) are how you find out. Hitting a trap typically produces a blocklist entry on Spamhaus or SORBS within hours.
Can I recover from blocklisting?+
Yes, but it takes 2-8 weeks of corrected sending. Volume reduction, list re-verification, and engagement-only sending during recovery.
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We update these pages when the underlying mechanics change. new mailbox-provider rules, new tracker behavior, new measurement gaps. The dates above are real revisions, not auto-touches.