diff --git a/set_myhostname.sh b/set_myhostname.sh
index a88dad5..ba9429f 100644
--- a/set_myhostname.sh
+++ b/set_myhostname.sh
@@ -2,12 +2,16 @@
 
 IP=$(curl ifconfig.me)
 curl_retval=$?
+
+if [ $curl_retval -gt 0 ]
+	# TODO send warning email to postmaster here
+	exit 1
+fi
+
 host_answer=$(host "$IP")
 rev_dns="${host_answer##* }"
 rev_dns="${rev_dns%.}"
 
 echo "Rev. DNS is: $rev_dns"
 
-sed -e "s/^myhostname.*/myhostname = $rev_dns ses/" /etc/postfix/main.cf
-
-echo $curl_retval
+sed -e "s/^myhostname.*/myhostname = $rev_dns/" -i /etc/postfix/main.cf