--- b/lbdb_lib.sh.in	2019-01-07 19:30:29.000000000 +0100
+++ a/lbdb_lib.sh.in	2020-05-06 10:13:38.987327900 +0200
@@ -56,11 +56,8 @@
 	else
 		hn=""
 		if test -r /etc/resolv.conf ; then
-			hn="$(sed -n -e 's/^[ 	]*domain[ 	]\{1,\}\([^ ]*\)/\1/p' /etc/resolv.conf)"
-			if test "x$hn" = "x" ; then
-				hn="$(sed -n -e 's/^[ 	]*search[ 	]\{1,\}\([^ ]*\)/\1/p' /etc/resolv.conf)"
-			fi
-		fi
+    		hn=`awk '/^#/{next}($1 == "search" || $1 == "domain" ) && $2 != "" {print $2;exit}' < /etc/resolv.conf`
+        fi
 		if test "x$hn" = "x" ; then
 			hn=$(lbdb_hn_sendmail)
 			if test "x$hn" = "xNONE" ; then