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Help setting up lemmy instance (lemmy.ml)

submitted 1 year ago* (last edited 1 year ago) by slashzero@lemmy.ml to c/lemmy_support@lemmy.ml

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Hi! I decided to experiment with my own instance. Went the docker route, and got everything working, except mail.

I setup postfix, and I can send mail to yahoo from the cli, however neither localhost:25 or actual.fqdm:25 work from the running lemmy_lemmy_1 container. The error is:

FQDM: email_send_failed: Connection error: Connection refused (os error 111)
localhost:25 email_send_failed: Connection error: Address not available (os error 99)

Has anyone seen this? Feels like a connectivity issue between the running container and host.

This is not letting me save an email address in my user settings.

I guess the intent is for people to use an external smtp service, rather than set up their own?

UPDATE:

tldr; I got mail working with postfix running locally.

I tried several "free" smtp relay services, and consistently got timeout errors.
Out of frustration, I re-enabled my local postfix server and reconfigured Lemmy back to that.
Tailing the postfix logs, I noticed it was rejecting the connection from the Lemmy instance with a relay not allowed error, which had an "internal IP of 192.x" (from the lemmyinternal network).
So, I added that IP /32 to "mynetworks" on the host in /etc/postfix/main.cf, restarted postfix, and my instance can now send out emails. Yay!

Thanks for the suggestions everyone. I'll leave this post here in case anyone else runs into this problem.

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[–] poVoq@slrpnk.net 2 points 1 year ago (6 children)

You need to put the container name inside the docker network as the host.

But besides that, you are not going to have a good time sending many emails from a self-hosted email server because of spam filtering. Better use an external SMTP service.

[–] slashzero@lemmy.ml 1 points 1 year ago* (last edited 1 year ago)

You need to put the container name inside the docker network as the host.

I was not sure what you meant by this. The closest possibly was this?

lemmy-ui:
    image: dessalines/lemmy-ui:0.17.4-rc.4
    networks:
      - lemmyinternal
    environment:
      # this needs to match the hostname defined in the lemmy service
      - LEMMY_UI_LEMMY_INTERNAL_HOST=lemmy:8536
      # set the outside hostname here
      - LEMMY_UI_LEMMY_EXTERNAL_HOST=localhost:1236
      - LEMMY_HTTPS=true
    depends_on:
      - lemmy
    restart: always

I changed localhost:1236 to my FQDM:1236 and it did not seem to have any impact either way. Maybe it did? I honestly don't know. But, I thank you for the help anyway!

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