emails only reach instance domain email addresses - eviltoast

I’ve been trying to get some friends signed up on my lemmy instance.

The issue is, so far nobody seems to be receiving the signup/verification emails. I am getting the admin user-signup emails, but those are sent to contact@<instance-domain>. I created 2 test users, one with a instance-domain address, and one to a gmail. The instance-domain address was there within a minute, but the gmail one has yet to arrive.

Instance details:

OS: Ubuntu 22.04

Lemmy: Lemmy-Ansible install, on 0.18.0, modified to removed network settings per https://github.com/LemmyNet/lemmy-ansible/pull/102

Any ideas why this might be happening?

  • terribleplanEnglish
    2•1 year ago

    I got an email when I signed up as a test. It is most likely spam filters and/or improper email server setup. I will try to help debug in a bit.

      • terribleplanEnglish
        2•1 year ago

        It looks like you aren’t signing your mail with DKIM, don’t have SPF set up right, don’t have a DMARC policy, and don’t have RcRDNS, all of which basically any mail provider will require from you to even consider accepting your mail. Basically without all of that literally anyone can pretend to be whatever.com and send email from it.

        What mail provider are you using?

        • @Ripost@ripo.stOPEnglish
          0•1 year ago

          yeah, I’m just using the default local mailserver that comes with Lemmy. the contact address is just a redirect to a gmail account. Didn’t even realize I needed all of that. I’ll probably end up just going through a smtp relay on one of their free tiers to avoid figuring this all out.

          • terribleplanEnglish
            2•1 year ago

            Yeah… they really shouldn’t be shipping that mail relay at all IMO, just leads to confusion.

            I do run my own mail and assuming it’s reasonably low volume would be more than happy to get you set up to use my mailserver instead of relying on something like sendgrid or postmark.

            Alternatively if you want some help getting your own set up in a dockerized way I run my mail using docker-mailserver and if only set up for outgoing mail it is pretty easy to run, though you may will run into deliverability issues…

            • @Ripost@ripo.stOPEnglish
              0•1 year ago

              yeah, at the very least it should be commented out so that you know it’s not just setup and go.

              I appreciate the offer! I’ve actually already got myself setup on Brevo, though I might look into docker-mailserver in the future. If it’s alright, I’ll ping you if I/when I do that if I need help.

              Thanks for all the help!

              • terribleplanEnglish
                2•1 year ago

                I’d be glad to help. The more people actually run their own mail the harder it gets for the big players to shut us out, haha.

  • @johntashEnglish
    1•1 year ago

    What are you using for your smtp server? Is it something with the same domain?

    Also can you access the email you send from and see if it’s maybe bouncing back? If not, you’ll probably need to check the mail server logs and see if it’s being rejected for some reason.

    • @Ripost@ripo.stOPEnglish
      2•1 year ago

      looked through the logs for the postfix container, turns out gmail requires SPF or DKIM to be setup for a domain or it will reject emails. I’ll probably just end up using a free external STMP service

    • @Ripost@ripo.stOPEnglish
      1•1 year ago

      I’m using the default mail setup proivded with Lemmy. As far as I understand, it is outbound only. I’ll look into the mail server log and see if I can find any details