mhmail with no arguments is equivalent to inc
EOF
-mhmail -help >$actual 2>&1
-check $expected $actual
+#### Skip nmh intro text.
+mhmail -help | sed '/^$/Q' >"$actual" 2>&1
+check "$expected" "$actual"
# check -version
DATA
To: recipient@example.com
From: sender8@localhost
+MIME-Version: 1.0
+Content-Type: text/plain; charset="us-ascii"
Date:
Message-ID: