Spam trap

What Spam trap means

Blocklist operators and mailbox providers run two kinds. A pristine trap is an address nobody ever used and nobody ever published for a human to read, so mail arriving at it was harvested, guessed or bought. A recycled trap is a real address that was abandoned, left to bounce for months and then reactivated as a trap; mail arriving at it means the sender never acted on the hard bounces it was given.

Neither kind ever complains, unsubscribes or opens anything, and that is the point — a trap measures acquisition and hygiene rather than content. A single hit on a pristine trap is enough for a listing on some zones, while repeated hits on recycled traps produce the slower decline a sender usually notices as engagement falling at one provider at a time.

There is no way to find and remove spam traps from a list, because a trap that could be identified would be useless. The defence is procedural: confirmed opt-in, no purchased or appended lists, suppression of every hard bounce on the first occurrence, and removal of addresses that have gone quiet for long enough that they may since have been abandoned.