The various embodiments described herein include methods, devices, and systems for relaying messages. In one aspect, a method includes: (1) obtaining a first plurality of incoming messages from a first set of users; (2) obtaining a second plurality of incoming messages from a second set of users, the second plurality of incoming messages comprising priority messages; (3) receiving one or more selection criteria from a user of the messaging system, including one or more keywords; (4) identifying a set of target messages from among the first plurality of messages based on the one or more keywords; (5) selecting a subset of the set of target messages; (6) selecting a set of priority messages from among the second plurality of messages based on the one or more keywords; and (7) sending the subset of target messages and the set of priority messages to a client device of the user.