We are currently running Discourse with a multisite setup, and we plan to use the Mail Receiver for email handling. I have a question about the configuration: Is it possible to configure a single Mail Receiver container to handle incoming emails for all forums in the multisite setup? I want to ensure that the incoming emails are correctly routed to the appropriate forum based on their domain. Has anyone configured Mail Receiver in a similar setup? Any guidance, examples, or best practices would be greatly appreciated!

I just did something similar which is working [image] Configure direct-delivery incoming email for self-hosted sites with Mail-Receiver Self-Hosting On my dedicated server (running Ubuntu 22.04, with Postfix installed) I use a separate mail-receiver.yml paired to each instance of Discourse where I have enabled the mail-in posting feature. This setup creates a separate container for each instance of Discourse on my server (alongside the typical app container) which receives and processes the e-mails for its corresponding Discourse instance. Incoming emails for all of the Discourse forums on the server are received by Postfix through the sta…

It might be sufficient to adapt this function for multisite: lib/mail_receiver/discourse_mail_receiver.rb 9b1b99902 def endpoint return @endpoint if @endpoint @endpoint = @env["DISCOURSE_MAIL_ENDPOINT"] if @env["DISCOURSE_BASE_URL"] @endpoint = "#{@env["DISCOURSE_BASE_URL"]}/admin/email/handle_mail" end @endpoint end

Thanks for sharing this , but what about the API key how will the mail receiver handle this ?

A hacky way would be to use the same API key on every instance.

Sounds crazy but I can give it a try!

Thank you so much @denvergeeks for sharing this with me but I have some questions:- Have you installed Postfix on your server first? According to your docs I will need to create a mail receiver container for each forum right? You map the domain to its corresponding forum using the transport map. I see that you have made some changes to the volume mounts too. [The image shows a section of a YAML configuration file with two volume mappings related to the Discourse mail receiver. (Captioned by AI)]

Thanks for the confirmation, but can you explain why did you add additional volume because I see both are even different from the default one

It is because of this section… to make available the functionality for blocking certain domains.

Greate, one last question . Should I create a new path for each mail receiver for example I have about 10 forums so I will need to create new volume for each one od them like this Default forum: - volumes: host: /var/discourse/shared/mail-receiver/postfix-spool guest: /var/spool/postfix First forum: - volumes: host: /var/discourse/shared/mail-receiver-1/postfix-spool guest: /var/spool/postfix Second forum: - volumes: host: /var/discourse/shared/mail-receiver2/postfix-spool guest: /var/spool/postfix

Can a single Mail Receiver handle emails for all sites in a Discourse multisite setup?

Product Support

denvergeeks January 6, 2025, 10:11pm 8

Yes, all correct.

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Can a single Mail Receiver handle emails for all sites in a Discourse multisite setup?

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