I cant get my email sending to work on my instance. After trying for hours, i wanted to ask for some support here since im quite stuck and dont understand.

I installed Lemmy using ansible so everything is set up in a very standard way - except email.

I want my instance to send email to an external smtp server (Fastmail) whenever there is a need to send an email (user registration, password reset, etc).

Currently the email settings in lemmy.hjson looks like this:

  email: {
    smtp_server: "postfix:25"
    smtp_login: "[email protected]"
    smtp_password: "fastmail_user_password_here"
    smtp_from_address: "[email protected]"
    tls_type: "tls"
  }

It seems like i need to have postfix:25 as the smtp server. What i really want is to put smtp.fastmail.com:465 here since thats what i want to use to send email. But that doesnt seem to work.

So I understand I need to send email through postfix, but then I wonder, how should the config look like to send emails to smtp.fastmail.com on port 465 (which is what they have on fastmail), with a specific username and password used on the fastmail server?

I think a lot of people are having issues with the email part of the setup, judging from the many reports of spinning buttons on user signup… this is a very likely reason, specially since there is no error message to the user.

Please help me sort this out, how should i configure this?

EDIT:

Ok after a lot of experiments and help from people below, this was the solution.

  email: {
    smtp_server: "smtp.fastmail.com:587"
    smtp_login: "[email protected]"
    smtp_password: "password"
    smtp_from_address: "[email protected]"
    tls_type: "starttls"
  }

Using this, email sending finally works. I couldnt use something else in the smtp_from_address. Which means my real email gets shown to users, so I will probably create another email address for this purpose completely.

Also specific to Hetzner instances, they dont block port 487 so you can use that with starttls.

    • cablepick@lemmy.cablepick.net
      1·
      1 year ago

      Did you try sending an email through OpenSSL using shell commands? Lemmy has no test email function so you need to be sure your credentials are correct.

      It’s not uncommon for email servers to prevent you from sending as someone else even if you authenticate against your primary account. When using the OpenSSL shell commands it should end a successful test send with 250 ok queued or display an error like from not owned by primary account.

      • mrmanager@lemmy.today
        1·
        1 year ago

        I got as far as connecting and authenticating, that works fine with starttls and port 587. I didn’t actually send an email though, maybe I should try that and put different things in the smtp_from field, if possible?

        • cablepick@lemmy.cablepick.net
          1·
          1 year ago

          Try sending an email through there. That will tell you right away if you mail server will allow to you use the from address you want to. The message that it responds with is the message that lemmy, or whatever relay, would be logging anyways.