A method of suppressing the number of PIM messages from extranet receivers is disclosed. Each receiver, before sending a PIM message, first searches for any other receivers other than itself. If there are no other receivers, then the PIM message is sent; otherwise, the receiver suppresses sending the PIM message. PIM Join, triggered Join, and Prune messages may be suppressed. If there are multiple receivers, the PIM messages are sent by a source Extranet receiver located in a provider edge router, for example. The receiver sends the PIM messages for the rest of the Extranet receivers in the provider edge router, and also maintains a counter, ensuring that only one PIM message is sent within a specified time period. As a result, the number of PIM messages traversing core elements of a service provider network may be greatly reduced.