diff --git a/README.md b/README.md
index eaee232..df1a48b 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ using this way other proccesses could provide the email content
 all of these are optinal but when uses the overwrite the counterpart variable  
 | Variable Name      | Description |
 |--------------------|-------------|
-|`MSMTP_CONFIG_FILE` | This is the config file msmtp uses<br>this replaces the need for most other Environment variables<br>When you use this only `EMAIL` or `TO_ADDRESSES`, `SUBJECT`, `MESSAGE` are requered<br>to see what the file sould contain have a look at the [Documentation](https://marlam.de/msmtp/msmtp.html#Configuration-files) or a [Example](https://marlam.de/msmtp/msmtprc.txt)
+|`MSMTP_CONFIG_FILE` | This is the config file msmtp uses<br>this replaces the need for most other Environment variables<br>When you use this only `EMAIL` or `TO_ADDRESSES`, `SUBJECT`, `MESSAGE` are requered<br>to see what the file sould contain have a look at the [Documentation](https://marlam.de/msmtp/msmtp.html#Configuration-files) or a [Example](https://marlam.de/msmtp/msmtprc.txt)<br>the file **MUST** have [permissions](https://linuxcommand.org/lc3_lts0090.php) set to 600
 |`SMTP_HOST_FILE`    |
 |`SMTP_PORT_FILE`    |
 |`SMTP_FROM_FILE`    |