What is a spam trap and how do you avoid sending to one?
Spam traps are addresses that exist only to catch senders with bad lists. The three types, how they end up on your list, what verification can and cannot detect, and how to stay clear.
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Deliverability, explained.
Guides and research on email verification, bounce rates, catch-all domains, disposable addresses, list hygiene and sender reputation. Written by the people who run the engine.