diff --git a/README.md b/README.md
index dca5853..c1ae96b 100644
--- a/README.md
+++ b/README.md
@@ -172,6 +172,22 @@ You can also forward all emails received by testi@testo.com to multiple destinat
 export SMF_CONFIG='testi@testo.com:test1@test.com|test2@test.com|test3@test.com'
 ```
 
+### `SMF_CONFIG_FILE` Examples
+
+If you want to have a config file instead of a config variable
+You can add it like:
+```bash
+cat <EOF > forwards
+testi@testo.com:test1@test.com|test2@test.com|test3@test.com
+from@testi.com:to@testo.com:ThisIsPassword
+EOF
+```
+
+And then run it:
+```bash
+docker run -e SMF_CONFIG_FILE=/forwards -v $(pwd)/forwards:/forwards -p 25:25  zixia/simple-mail-forwarder
+```
+
 ### `SMF_RELAYHOST` Examples
 
 Here's how to configure a relayhost/smarthost to use for forwarding mail.
@@ -190,6 +206,8 @@ If the `SMF_RELAYHOST` require authentication,
 export SMF_RELAYAUTH='username@relayhost.com:RelayHostPassword'
 ```
 
+
+
 TLS (SSL) Certificates
 --------------------
 
diff --git a/entrypoint.sh b/entrypoint.sh
index 7a7c5f8..00e27f1 100755
--- a/entrypoint.sh
+++ b/entrypoint.sh
@@ -17,6 +17,7 @@ $ docker run -p 25:25 \\
 Environment Variables:
     SMF_DOMAIN - mail server hostname. use tutum/docker hostname if omitted.
     SMF_CONFIG - mail forward addresses mapping list.
+    SMF_CONFIG_FILE - file name that contain forward adresses mapping list.
     SMF_MYNETWORKS - configure relaying from trusted IPs, see http://www.postfix.org/postconf.5.html#mynetworks
     SMF_RELAYHOST - configure a relayhost
     SMF_SENDERPRIVACY - strips sender's IP, client, and user agent.
@@ -349,6 +350,17 @@ else
     echo ">> END SMF_DOMAIN found. value:[$SMF_DOMAIN]"
 fi
 
+if [ "" == "$SMF_CONFIG_FILE" ]; then
+    echo ">> ENV SMF_CONFIG_FILE not set."
+elif [ ! -f "$SMF_CONFIG_FILE" ]; then
+    echo ">> $SMF_CONFIG_FILE doesn't exists, skipping reading it."
+else
+    echo ">> END SMF_CONFIG_FILE found. value:[$SMF_CONFIG_FILE]"
+    echo ">> INSERT config file into config var"
+    SMF_CONFIG=$(cat /$SMF_CONFIG_FILE | tr '\n' ';')
+    export SMF_CONFIG
+fi
+
 if [ "" == "$SMF_CONFIG" ]
 then
     echo ">> END SMF_CONFIG not set."