If both source and destination have UID 6, but the messages are different,
the headers don't match and both the messages are kept in the destination but
they're given new UIDs 7 and 8 just to be sure any client didn't get confused
-about what UID 11 actually was. Thus, one\-way sync begins to quickly diverge
+about what UID 6 actually was. Thus, one\-way sync begins to quickly diverge
from the source mailbox once changes start to occur on either side; one\-way
sync should therefore normally only be used within a short period of time
after a