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added warning message for PERMIT_DOCKER=network when using IPv6 (#1405)

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Georg Lauterbach 2020-09-27 22:14:27 +02:00
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docs/content/config/troubleshooting/faq.md
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@ -270,6 +270,8 @@ Please note that clamav can consume a lot of memory, as it reads the entire sign
Yes, by Adding the Environment Variable `PERMIT_DOCKER: network`.
**WARNING**: Adding the docker network's gateway to the list of trusted hosts, e.g. using the `network` or `connected-networks` option, can create an [**open relay**](https://en.wikipedia.org/wiki/Open_mail_relay), [for instance](https://github.com/tomav/docker-mailserver/issues/1405#issuecomment-590106498) if IPv6 is enabled on the host machine but not in Docker. ([#1405](https://github.com/tomav/docker-mailserver/issues/1405))
### How can I authenticate users with SMTP_ONLY?
See https://github.com/tomav/docker-mailserver/issues/1247 for an example.