Set up Reply via Email Support ✉

So you’d like to set up reply via email support for your Discourse forum.

:mega: Reply via email is pre-configured and enabled by default on all hosted sites. The guide below only applies to those self-hosting.

Good news! Unlike outgoing email, which is completely unsuitable for typical consumer mail services like GMail, Outlook, Yahoo Mail, etc, incoming reply via-email tends to be extremely low volume. Unless you have a truly massive forum with a zillion people replying to notification emails, you are probably safe using, say, Gmail.

:bell: Alternately, if you aren’t comfortable using GMail for this, you can set up your own incoming email service using Straightforward direct-delivery incoming mail

So here’s how to set it up using GMail as an example.

  1. Create a new GMail account. If you do not set up a completely new email account old emails will be synced via POP3, causing unforeseen issues and sending bounce notification emails!

  2. Assign the new account a username like or in my case, (if you are using a normal GMail account replace with here). Give it a strong password.

  3. Log in to this account via Accept the terms of service, enter the CAPTCHA, load the default web interface. Maybe send a test email, receive a test email. Kick the tires.

  4. POP3s access is off by default in Gmail, so turn it on via Settings, Forwarding and POP/IMAP:

    All incoming emails will be retained by default – but you can tweak as needed.

  5. Visit the Discourse settings and check the Email tab.

  6. Change the following settings:

    • reply_by_email_address enter replies+%{reply_key}
    • pop3_polling_username enter
    • pop3_polling_password enter the password of that email account
    • pop3_polling_host set to
    • pop3_polling_enabled set to true
    • reply_by_email_enabled set to true

There is a certain amount of polling that goes on for this account, but we’ve set it to a low, safe volume – you can configure the polling interval via the pop3 polling period setting.

We do assume that your email service supports plus addressing aka address tags, so check that before starting. GMail obviously does.

If everything is working, you should see the footer of all notification mails now tell you that you can reply either by visiting the website, or replying via email:

To respond, reply to this email or visit {topic URL} in your browser.

If things aren’t working:

  • check the /logs path on your Discourse in your web browser and look for email related error messages.

  • log into your mail account using your web browser and check for any errors or notifications.

Potential Issues

  1. We have seen difficulties when signing up for a GMail account from a different country than your server is located in. For example, if you create the Gmail account from the UK, but the server is in the USA.

  2. If you are using a GMail account (e.g. or a Google Apps mailbox (e.g. a Google mailbox, you will need to create an app password for your account, which is used in place of your account password in step 6.

    Alternatively, you may enable “access from less secure apps” in Google Account settings. If not, you will receive a “POP3 authentication failed” error in Discourse. Access from “less secure apps” is disabled by default.

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