mailcow-dockerized-docs/docs/u_e-postfix-anonym_headers.md
2018-10-15 23:54:33 +02:00

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**As of October the 15th, 2018 this is enabled by default.**
To disguise your users details like IP, email client, etc. we have to create a new file in `data/conf/postfix/mailcow_anonymize_headers.pcre` and insert the following:
```
/^\s*Received:.*Authenticated sender:(.+)/
REPLACE Received: from localhost (localhost [127.0.0.1]) (Authenticated sender:$1
/^\s*User-Agent/ IGNORE
/^\s*X-Enigmail/ IGNORE
/^\s*X-Mailer/ IGNORE
/^\s*X-Originating-IP/ IGNORE
/^\s*X-Forward/ IGNORE
```
Next we need to add the following to `data/conf/postfix/main.cf`:
```
smtp_header_checks = pcre:/opt/postfix/conf/mailcow_anonymize_headers.pcre
```
Then restart Postfix:
```
docker exec -it $(docker ps -qf name=postfix-mailcow) postfix reload
```