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A recycled spam trap is another type of spam trap. However, in this case, the emails used as traps were previously owned by a legitimate subscriber. These emails only become traps because the owners have abandoned them for an extended period. Mailbox providers and ISPs notify senders by sending them unknown SMTP bounce errors when email addresses are left, indicating a possible conversion into a spam trap.
Hitting a Recycled Spam Trap means you have not performed the list hygiene practices and your list still includes old email addresses.
You may also want to read: Everything You Should Know About Spam Traps and How to Avoid Them
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