If they are in the OutBox and they are too large to send, try shutting the system down. You should get a message asking if you want to send the items before shutdown, click NO. On re-booting the messages should have cleared.
Nokia 8 vs Galaxy S8
How artist Alex Yanes worked with his daughter on this bright 3D mural for Monument Valley 2
iMac 21.5-inch (2017) review
Comment regarder le lancement du Galaxy Note 8 en direct ?