An electronic device: displays an inbox view of a messaging application that includes one or more groups of electronic communications presented in a condensed mode, wherein a first group of electronic communications in the inbox view includes a first plurality of messages with at least one different subject and from a plurality of unrelated senders that are associated with a common characteristic; detects a first user input selecting an expansion affordance associated with the first group of electronic communications while in the condensed mode; and, in response to detecting the user input selecting the expansion affordance associated with the first group of electronic communications while in the condensed mode, the first group of electronic communications in an expanded view different from the condensed mode that includes at least some of the first plurality of messages associated with the first group of electronic communication.