Is it possible to send information between servers?

Like so I can send messages to people on other servers for example.

1. HttpService

   Requirements:

• A server to handle your http requests, like in this example from devforum (quickstart)

• HttpEnabled set to true on all the target servers

1. DataStoreService

   Requirements:

• The target servers must be on the same game (universe)

1. TeleportService

   Requirements:

• The target servers must must be owned by the same entity (player, group)

Note: This doesn't means necessarily the same game.