-.RE
-.PP
-.B $MAILDROP
-.RS 5
-This variable tells
-.B inc
-the default maildrop. This supersedes the \*(lqMailDrop\*(rq profile entry.
-.RE
-.PP
-.B $MAILHOST
-.RS 5
-This variable tells
-.B inc
-the POP host to query for mail to incorporate. See the
-inc(1) man page for more information.
-.RE
-.PP
-.B $USERNAME_EXTENSION
-.RS 5
-This variable is for use with username_extension masquerading. See the
-mh-tailor(5) man page.
-.RE
-.PP
-.B $SIGNATURE
-.RS 5
-This variable tells
-.B send
-and
-.B post
-your mail signature. This supersedes the \*(lqSignature\*(rq profile entry,
-and is not used when the \*(lqLocal\-Mailbox\*(rq profile component is set.
-.RE
-.PP
-.B $USER
-.RS 5
-This variable tells
-.B repl
-your user name and
-.B inc
-your default maildrop: see the \*(lqMailDrop\*(rq profile entry.
-.RE
-.PP
-.B $HOME
-.RS 5
-This variable tells all
-.B nmh
-programs your home directory
-.RE
-.PP
-.B $TERM
-.RS 5
-This variable tells
-.B nmh
-your terminal type.
-.PP
-The environment variable
-.B $TERMCAP
-is also consulted. In particular,
-these tell
-.B scan
-and
-.B mhl
-how to clear your terminal, and how
-many columns wide your terminal is. They also tell
-.B mhl
-how many
-lines long your terminal screen is.
-.RE
-.PP
-.B $MHMTSCONF
-.RS 5
-If this variable is set to a non-null value, it specifies the
-name of the mail transport configuration file to use by
-.BR post ,
-.BR inc ,
-and other programs that interact with the mail transport system,
-instead of the default. See mh-tailor(5).
-.RE
-.PP
-.B $MHMTSUSERCONF
-.RS 5
-If this variable is set to a non-null value, it specifies the name of
-a mail transport configuration file to be read in addition to the
-default. See mh-tailor(5).
-.RE
-.PP
-.B $MHTMPDIR
-.B $TMPDIR
-.RS 5
-These variables are searched, in order, for the directory in which to
-create some temporary files.
-.RE
-.PP
-.B $MHLDEBUG
-.RS 5
-If this variable is set to a non-null value,
-.B mhl
-will emit debugging information.
-.RE
-.PP
-.B $MHPDEBUG
-.RS 5