private - channel_two_name - %s %d user1@email user %d user1@email user2@email user %d user2@email user3@email user %d user3@email %s user1@email user %d message 0 user1@email %d path/to/attachments/file_0.txt user1@email %d path/to/attachments/file_0.txt Completed %s user1@email user %d message 1 user1@email %d path/to/attachments/file_1.txt user1@email %d path/to/attachments/file_1.txt Completed %s user1@email user %d message 2 user1@email %d path/to/attachments/file_2.txt user1@email %d path/to/attachments/file_2.txt Completed user2@email user %d user2@email user3@email user %d user3@email user1@email user %d user1@email %d