# Doc verduidelijking: reply-key adressen in Cc (niet alleen To) worden verwerkt

**URL:** https://meta.discourse.org/t/doc-clarification-reply-key-addresses-in-cc-not-just-to-are-processed/382325
**Category:** Feature
**Tags:** mail-receiver
**Created:** [11 september 2025 om 14:14 UTC](https://meta.discourse.org/t/doc-clarification-reply-key-addresses-in-cc-not-just-to-are-processed/382325 "2025-09-11T14:14:38Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Ethsim2](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/ethsim2/32/522255_2.png) [@Ethsim2](https://meta.discourse.org/u/Ethsim2)
#### Post date: [11 september 2025 om 14:14 UTC](https://meta.discourse.org/t/doc-clarification-reply-key-addresses-in-cc-not-just-to-are-processed/382325/1 "2025-09-11T14:14:39Z")

</div>

While reading and testing against the doc [Configure direct-delivery incoming email for self-hosted sites with mail-receiver](https://meta.discourse.org/t/configure-direct-delivery-incoming-email-for-self-hosted-sites-with-mail-receiver/49487), I noticed that one detail is missing: how Discourse handles the location of the reply-key address in an email reply.

Today I confirmed in testing (with **mail-receiver** ) that:

- A reply works if the Discourse reply-key address is in **To:**.
- A reply also works if the reply-key address is only in **Cc:** , even if To: points to a completely different address.
- The **order** of recipients does not matter (To vs Cc).
- Discourse will process the reply correctly as long as the reply-key address appears anywhere in the recipient list.

Other recipients simply get a copy of the message; their own replies will only work if they also include a valid reply-key for their account.

* * *

### Proposed doc addition

In the section explaining how mail-receiver processes incoming messages, add a note like this:

> **Note on reply-key handling**  
> Discourse will process an incoming reply-by-email message as long as the special reply-key address (e.g. `reply+abcdef123@forum.example.com`) appears anywhere in the recipients list.
> 
> - The reply-key does not have to be the primary **To:** address.
> - It may be in **To** , **Cc** , or **Bcc** , in any order.
> - This means you can send a reply with another person’s email in To: and place the Discourse reply-key in Cc: — the reply will still be matched to the correct topic.
> 
> Other recipients will just receive a copy of the email, but their own replies will only work if they also include a valid reply-key for their account.

* * *

This would save admins and users from wondering if the reply-key must always be in the To field.