Spam trap
Email Marketing
A spam trap is an email address used by inbox providers or blocklists to catch senders who mail people who never signed up or whose lists are stale.
A store emails a list it last used four years ago; a few recycled traps on it get the domain listed on a blocklist.
One trap hit can get your domain blocklisted and hurt delivery everywhere.
Not directly. Remove long-inactive contacts and never buy lists; that removes most risk.
It blocks pristine and typo traps at signup, because traps never confirm.
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