MailNavigator software has been created out of combination of the two advanced tools required for operation with email and usenet news: FILTER and NAVIGATOR.

The message search system enables advanced information search in the mail archives of the following popular programs: Windows Live Mail, Windows Mail (Vista), MS Outlook, Outlook Express, MS Mail, MS News, Mozilla Thunderbird, Opera Mail, The Bat, Netscape Messenger, Eudora, Forte Agent, Pegasus Mail, Eserv, and also for all the popular bases of the Fidonet information network. The search language of the filters includes the standard operators: OR, AND, NOT, NEAR, their synonyms, and parentheses for defining the order of operators. The search can be executed on the whole word or on a part of a word. In this program it is possible to use filters on the message content, and on some fields of the message header. There is also a special filter for filtering out identical messages transmitted by different newsgroups.