Connecting to a SMTP server on localhost:25 without auth?

[rrit (Ayke)]

I’m glad you got your mail setup running!

There are some updates on the email troubleshooting guide since yesterday. If you’re still not happy with your mail setup, maybe give it a try again!

Troubleshooting email on a new Discourse install

You just installed Discourse via the install guide, but email doesn’t seem to work. Unfortunately this means you can’t log in as an admin to finalize the install. Let’s troubleshootize! Try the doctor If you run ./discourse-doctor it will check several ways that your mail configuration might be broken, and offer advice. Try that first. Did you enter email settings correctly? The simplest way is to run ./discourse-setup again. Did you enter everything correctly? Y…

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@Jeremiah_van_Oosten

If I use the Docker host IP address (172.17.0.1), I get

hostname "172.17.0.1" does not match the server certificate

@Jeremiah_van_Oosten

In the end, I accept the fact that I cannot use TLS to communicate with SMTP running on the docker host (without getting certificates using a different hostname)

Can be solved by using:

@system

DISCOURSE_SMTP_OPENSSL_VERIFY_MODE: none

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@Jeremiah_van_Oosten

So any attempt to use the same hostname for the running container and the docker host will cause all requests issued from the container to go to the container itself and not the docker host.

What a fiasco!

… just default DNS resolving of domain name to IP.

@system

2. Check dns resolving for your smtp server name via getent hosts :

( dig , nslookup , ping etc. are not installed inside the container.)

getent hosts your.smtp.server