What are the correct settings passed to ./discourse-setup for connecting to an smtp server on localhost:25 without auth? I’m very surprised that this isn’t supported OOTB; it’s the default config on most linux installs… My server runs postfix locally; it is not accessible from the Internet. It wor…

[imagen] maltfield: I’m very surprised that this isn’t supported OOTB; it’s the default config on most linux installs… I think that hasn’t been very true for about 20 years. You can’t use discourse-setup for situations like yours because few people have non password protected smtp servers, e…

[imagen] pfaffman: I think that hasn’t been very true for about 20 years. In 2019, it’s the default config for postfix on RHEL/CentOS. Postfix binds only to the loopback interface and drops all smtp requests that don’t originate from 127.0.0.0/8. No auth required. I’m not sure about debian, b…

@maltfield Just wanted to say thank you for the instructions. I ran into same issue on Debian… Could create a separate mail user for Discourse I suppose and have it connect and log in to site:465 but connecting to port 25 from the inside is more logical, in my opinion. And by the way, on Debian 10…

[imagen] pfaffman: I think that hasn’t been very true for about 20 years. You can’t use discourse-setup for situations like yours because few people have non password protected smtp servers, even behind a firewall. Maybe you are misunderstanding what @maltfield is saying? For as long as I c…

Yes, most linux servers don’t require auth to send mail (either by default or after installl & configuring). Nor is it necessary if they don’t relay from anywhere but the local network. The default Discourse install scripts won’t work for most servers. It’s designed for a narrow set of docker-based …

Well, I almost always defer to you on such matters! I guess it’s been a good number of years since I’ve run an SMTP server on localhost, so it’s a good bet that I don’t know what I’m talking about. [imagen] maltfield: Yes, most linux servers don’t require auth to send mail (either by default or…

If the host where the container is running has a name you can get via DNS, it works just to specify that: DISCOURSE_SMTP_ADDRESS: real.machine.example.com Postfix will still see that the source of the mail is local and handle it that way.

If the DISCOURSE_HOSTNAME and the DISCOURSE_SMTP_ADDRESS are the same, will this cause issues? I’ve setup Postfix & Dovecot on the Docker host to accept authenticated requests over TLS. I have valid certificates for my server, but whatever configuration I try, I can’t get Discourse to send mails co…

So, I figured there was something fishy about using using the same hostname for both the Discourse server and the SMTP server. Further investigation reveals that the docker container adds the following entry to the hosts file: 172.17.0.2 discourse.[mydomain].com discourse So any attempt to use th…

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). To get this to finally work, I had to make sure that 172.17.0.0/16 is added to the mynetworks variable in Postfix main.cf file: mynetwor…

¿Conectar a un servidor SMTP en localhost:25 sin autenticación?

Soporte Instalación

Jeremiah_van_Oosten (Jeremiah van Oosten) 14 Febrero, 2022 14:58 15

Esto era lo que me faltaba. Ahora funciona con TLS.

También he conseguido que funcione DKIM, así que los correos ya no deberían ser marcados como spam.

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¿Conectar a un servidor SMTP en localhost:25 sin autenticación?

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