-.TH MH-MAIL %manext5% "March 7, 2013" "%nmhversion%"
+.TH MH-FOLDERS %manext5% "July 22, 2014" "%nmhversion%"
.\"
.\" %nmhwarning%
.\"
sequence has at most just a single message number, not a range.
.PP
Sequence names have a maximum size of 998 characters. Each line is also
-limited to a maximum of 998 characters, but RFC\-822 continuation rules
+limited to a maximum of 998 characters, but RFC 822 continuation rules
apply; sequences can be continued across multiple lines by prefixing
continuation lines with a whitespace character.
.PP
that accesses these files must be sure to lock them using the same
locking method as
.BR nmh .
-The locking method is selected when
+The default data locking method is selected when
.B nmh
is configured and can be accessed as a string using
-.BR "mhparam lockmethod" .
+.BR "mhparam datalocking" .
+By default, fcntl locking is used, but this may be overridden with
+the
+.B datalocking
+profile entry.
+.PP
+A second, possibly different, locking method is used by
+.BR inc (1)
+when accessing the user's mail spool file or by
+.B nmh
+programs that open any mbox file. This locking method can be overridden
+when
+.B nmh
+is configured, or in the
+.B nmh
+mts configuration file, and can be accessed as a string using
+.BR "mhparam spoollocking" .
By default, kernel-level locking is used if appropriate for the
platform, and it is for popular platforms. That default should also
be the same as used by the
.IR folder (1),
.IR mail (1),
.IR mark (1),
-.IR mh\-param (1),
-.IR mh\-path (1),
+.IR mhparam (1),
+.IR mhpath (1),
.IR mh\-profile (5),
.IR mh\-sequence (5),
+.IR mh\-tailor (5),
.IR pick (1),
.IR rcvstore (1)