+will use the next available message number which is above the message
+number you wish to preserve.
+.PP
+As message sequences are folder-specific, moving the message from
+the source folder removes it from all its sequences in that folder.
+.B \-retainsequences
+adds it to those same sequences in the destination folder,
+creating any that don't exist.
+This adding does not apply for the \*(lqcur\*(rq sequence.