diff --git a/README.md b/README.md
index 66337e5a..a34efd12 100644
--- a/README.md
+++ b/README.md
@@ -94,6 +94,9 @@ Example:
   * *6.31* (default) => add 'spam detected' headers at that level
 * SA_KILL
   * *6.31* (default) => triggers spam evasive actions)
+* SASL_PASSWORD
+  * *empty* (default) => No sasl_passwd will be created
+  * *string* => A /etc/postfix/sasl_passwd will be created with that content and postmap will be run on it
 
 Please read [how the container starts](https://github.com/tomav/docker-mailserver/blob/master/start-mailserver.sh) to understand what's expected.  
 
diff --git a/start-mailserver.sh b/start-mailserver.sh
index 8756643a..1af17c30 100644
--- a/start-mailserver.sh
+++ b/start-mailserver.sh
@@ -182,6 +182,17 @@ else
   echo "==> Warning: '/tmp/postfix/main.cf' is not provided. No extra postfix settings loaded."
 fi
 
+if [ ! -z "$SASL_PASSWD" ]; then
+  echo "$SASL_PASSWD" > /etc/postfix/sasl_passwd
+  postmap hash:/etc/postfix/sasl_passwd
+  rm /etc/postfix/sasl_passwd
+  chown root:root /etc/postfix/sasl_passwd.db
+  chmod 0600 /etc/postfix/sasl_passwd.db
+  echo "Loaded SASL_PASSWORD"
+else
+  echo "==> Warning: 'SASL_PASSWORD' is not provided. /etc/postfix/sasl_passwd not created."
+fi
+
 echo "Fixing permissions"
 chown -R 5000:5000 /var/mail
 mkdir -p /var/log/clamav && chown -R clamav:root /var/log/clamav