Selectively blocking instant messages according to a do not instant message list

A method for selectively blocking the transmission of an unsolicited instant message, the method comprising the steps of:

• receiving for routing to an instant messaging client, an instant message in an instant messaging server managing instant messaging communications between instant messaging clients over a computer communications network, the instant message designating an intended recipient;
• locating said intended recipient in a do not instant message list in the instant messaging server;
• and,
• responsive to said location of said intended recipient in said do not instant message list, blocking routing of said instant message for completion of transmission of said instant message to said intended recipient by determining whether said instant message is an unsolicited instant message transmitted from a bot and selectively blocking said instant message if said do not instant message list indicates that unsolicited instant messages are to be blocked, and requiring sender of the instant message update a local copy of the do not instant message list so as to incorporate the designated recipient in the local copy.