add_message '[id]="duplicate"' '[subject]="message 1" [filename]=copy1'
add_message '[id]="duplicate"' '[subject]="message 2" [filename]=copy2'
add_message '[id]="duplicate"' '[subject]="message 1" [filename]=copy1'
add_message '[id]="duplicate"' '[subject]="message 2" [filename]=copy2'