Mail-Receiver Configuration: 403 Error on smtp_should_reject Endpoint

Support
1

Hello Discourse Community,

I’m encountering an issue while setting up the mail-receiver for my self-hosted Discourse forum. Despite following the official documentation here, I’m receiving the following error in my logs:

Failed to GET smtp_should_reject answer from https://forum.get.it/admin/email/smtp_should_reject.json: 403 450 4.7.1 replies+d6c9064e799543ae371fbf74ba32845a@reply.get.it: Recipient address rejected: Internal error, API request failed

Here’s my current mail-receiver.yml configuration:

base_image: discourse/mail-receiver:release
update_pups: false

expose:
  - "25:25"   # SMTP

env:
  LC_ALL: en_US.UTF-8
  LANG: en_US.UTF-8
  LANGUAGE: en_US.UTF-8

  MAIL_DOMAIN: reply.get.it
  POSTCONF_smtpd_tls_key_file: /letsencrypt/reply.get.it/reply.get.it.key
  POSTCONF_smtpd_tls_cert_file: /letsencrypt/reply.get.it/fullchain.cer
  POSTCONF_smtpd_tls_security_level: may

  DISCOURSE_BASE_URL: 'https://forum.get.it'
  DISCOURSE_API_KEY: [**************]
  DISCOURSE_API_USERNAME: system

volumes:
  - volume:
      host: /var/discourse/shared/mail-receiver/postfix-spool
      guest: /var/spool/postfix
  - volume:
      host: /var/discourse/shared/standalone/letsencrypt
      guest: /letsencrypt

Steps I’ve taken so far:

  1. API Key Regeneration: Generated a new API key and updated the DISCOURSE_API_KEY in mail-receiver.yml.
  2. Configuration Verification: Checked that DISCOURSE_BASE_URL and MAIL_DOMAIN are correctly set.
  3. Container Rebuild: Ran ./launcher rebuild mail-receiver after making the above changes.

Despite these efforts, the issue persists. Has anyone faced a similar problem or can provide insights into what might be going wrong?

Thank you in advance for your assistance!

2

Is your API Key’s scope granular ou global (though if you didn’t have the tight permissions I suppose the error message would be different, like unauthorized… :thinking: ?

Is there more information in your logs?