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Spamtrap / Honeypot
Spamtraps or Honeypots are email addresses published by various antispam providers or individual owners on a number of websites and/or forums. Nobody ever actually uses them to send messages.
How a Spamtrap works
If a message reaches one of these addresses, this means that it was collected manually (or via a spambot) and so must be spam. Double opt-in (validation of the recipient's address by email) cannot possibly have occurred with such an address.
The servers used are immediately and automatically registered and blacklisted. For an email service provider like Infomaniak, this is an extremely serious situation because all our clients can no longer reach a large number of their regular correspondents. The organisation only removes the offending email server from its blacklist when the latter demonstrates that action has been taken against the culprit, which can take a certain amount of time.