Use standard computer selection methods. control+a = select all click message 1 to select it, move up or down several messages and hold the shift key while clicking message 2 = selects messages 1 and 2 and all in between hold the control key while clicking random messages = select any message clicked on hold the control key while clicking a selected message = deselect that message Press the delete key of your choice Be sure to compact folders after large deletions. Deleting a message just marks it for deletion and hides it. Compacting removes the message and frees up the drive space.