What Is Spam Trap?
A spam trap is an email address created or repurposed by mailbox providers and anti-spam groups specifically to catch senders with poor list hygiene. Because a legitimate sender should never email a trap, hitting one is strong evidence of bought lists or scraping — and can severely damage reputation.
There are two main types. Pristine traps are addresses never used by a human and never opted in to anything; mailing one means you scraped or guessed the address. Recycled traps are formerly real addresses that were abandoned and later reactivated as traps — mailing one means your list is stale.
Spam traps are invisible: you cannot see which addresses on your list are traps, and there is no bounce to warn you. The only defenses are prevention — never buy or scrape lists, use double opt-in, and regularly remove long-inactive subscribers.
Hitting traps repeatedly can land your IP or domain on major blacklists like Spamhaus, causing widespread delivery failures. This is why list hygiene is non-negotiable for serious senders.
MailPilot warms up your mailboxes against a curated network of real, engaged peers — never scraped addresses — so warmup itself carries zero spam-trap risk.
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