test_file msg_15.txt msg_15-1.txt -b text/html
test_file msg_15.txt msg_15-2.txt -i text/html
test_file msg_22.txt msg_22-1.txt -r content-id
test_file msg_15.txt msg_15-1.txt -b text/html
test_file msg_15.txt msg_15-2.txt -i text/html
test_file msg_22.txt msg_22-1.txt -r content-id