diff --git a/run.sh b/run.sh
index 55ed1b1..8027f8f 100644
--- a/run.sh
+++ b/run.sh
@@ -54,7 +54,7 @@ if [ ! -f /etc/postfix/sasl_passwd -a ! -z "${SMTP_USERNAME}" ]; then
   grep -q "${SMTP_SERVER}" /etc/postfix/sasl_passwd  > /dev/null 2>&1
   if [ $? -gt 0 ]; then
     echo "Adding SASL authentication configuration"
-    echo "[${SMTP_SERVER}]:${SMTP_PORT} ${SMTP_USERNAME}@${DESTINATION:-localhost}:${SMTP_PASSWORD}" >> /etc/postfix/sasl_passwd
+    echo "[${SMTP_SERVER}]:${SMTP_PORT} ${SMTP_USERNAME}:${SMTP_PASSWORD}" >> /etc/postfix/sasl_passwd
     postmap /etc/postfix/sasl_passwd
   fi
 fi