# Email threading broken

**URL:** <https://meta.discourse.org/t/email-threading-broken/221879>\
**Category:** Bug\
**Created:** [March 24, 2022, 3:45pm UTC](https://meta.discourse.org/t/email-threading-broken/221879 "2022-03-24T15:45:40Z")\
**Posts on this page:** 1\
**Showing post:** 1

<div class="post-metadata">

**Author:** ![tomtjes](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/tomtjes/32/131271_2.png) [@tomtjes](https://meta.discourse.org/u/tomtjes)\
**Post date:** [March 24, 2022, 3:45pm UTC](https://meta.discourse.org/t/email-threading-broken/221879/1 "2022-03-24T15:45:40Z")

</div>

My email client no longer groups emails from Discourse in threads. I assume it has to do with the fact that `In-Reply-To` never matches a previous `Message-ID`:

First post:

```plaintext
Message-ID: <topic/1084.23319831779de465ac375ecf@mydomain.com>
References: <topic/1084@mydomain.com>

```

1st reply:

```plaintext
Message-ID: <topic/1084/2214.3da8a000c93bc4ebe1be7dc8@mydomain.com>
In-Reply-To: <topic/1084@mydomain.com>
References: <topic/1084@mydomain.com>

```

2nd reply

```plaintext
Message-ID: <topic/1084/2215.9e39f57fbc3836748bbb7407@mydomain.com>
In-Reply-To: <topic/1084/2214.1db1dbd94b11c9d94ca45b3a@mydomain.com>
References: <topic/1084@mydomain.com>

```

My instance runs Discourse 2.9.0.beta2 ([ea3a58d051](https://github.com/discourse/discourse/commits/ea3a58d051c27548cd55afdcc99a38f9512f9a86))

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