This API provides basic blacklist management functionality. No mailings will be sent to contacts that are matched by a blacklist expression. A blacklist expression may be:

  • a literal expression, i.e. a specific email adress such as, or
  • a wildcard expression, such as * or postmaster@*.

In addition to user-defined blacklists, Maileon has the global blacklists with IDs 1 and 2. For security reasons, these cannot be accessed through the blacklist API. Trying to manage global blacklists will result in an HTTP response of 403 Forbidden.