# Blacklists

Blacklists are used to prevent a user from registering, sending an email or posting a comment if one of the fields in the form sent contains a term included in one of these lists. It is also possible to "ban" a user on the basis of his or her IP address (remember, however, that several users may be behind the same IP!).

All these lists apply to comments, member registrations and the "contact" page, except for the "Words" list, which does not apply to registrations. The IP address list also applies to voting.

Use wildcards (?) and (*) to replace any character or sequence of characters respectively. For example, in the "Email addresses" list, the following entry will prohibit all comments and entries with a "mail.ru" email address:

    *@mail.ru