1999-03-02 09:44:33 10HmaX-000000005vi-0000 <= userx@cus.cam.ac.uk U=CALLER P=testproto S=sss
1999-03-02 09:44:33 10HmaX-000000005vi-0000 => userx <userx@test.ex> R=localuser T=local_delivery
1999-03-02 09:44:33 10HmaX-000000005vi-0000 Completed