diff --git a/certbotd.sh b/certbotd.sh
index 42ccbc9..7cb54cc 100755
--- a/certbotd.sh
+++ b/certbotd.sh
@@ -94,7 +94,7 @@ case $1 in
           test -d "/etc/letsencrypt/live/${domain}" && continue
 
           # Ignore non local domains
-          nslookup "${domain}" 8.8.8.8 | grep -q "${SUTTY_ADDRESS}" || continue
+          nslookup "${domain}" 8.8.8.8 | grep -qE "^(${SUTTY_ADDRESSES// /|})$" || continue
 
           # Get the certificate for the domain, the webserver will need
           # access to this directory