### Begin of the insertion

Actually, I am not so sure, that the bug actually exists. It looked quite strange in mutt, and, to be honest, I did not really look into the actual mail source, without a mail client interpreting.

If so, I want to apologize



Best regards


Steffen

###

###

###End of the insertion Before filing a report

_Before you file a report, please ensure you are running the latest version of OpenProject and_ 
_have searched for similar bug reports._

**OpenProject Begin of the insertion12.5.8**End of the insertion Begin of the deletion 12.5.8** End of the deletion

### Steps to reproduce

_Please write down the steps to reproduce. Try to write down all necessary preconditions (what permissions do you have, are other users involved?). Example:_

Configure submission of bulk notigfication mails, receiving the mail

### What is the buggy behavior?

_Please describe the bug in as much detail as possible. Example:_

The headers in the emails look like the following:

```text
From openproject@EXAMPLE.FOO Thu Aug 17 10:00:06 2023
Return-Path: <openproject@EXAMPLE.FOO>
Delivered-To: USER1@EXAMPLE.FOO
Received: by openproject.dev.EXAMPLE.FOO (Postfix, from userid 112)
id 340171A450C; Thu, 17 Aug 2023 10:00:06 +0200 (CEST)
Date: Thu, 17 Aug 2023 10:00:06 +0200
From: Openproject <openproject@EXAMPLE.FOO>
To: USER1@EXAMPLE.FOO
Message-ID: <op.digest.20230817080006.2328@EXAMPLE.FOO>>
Subject: Openproject - 2 unread notifications including a mention
Mime-Version: 1.0
Content-Type: multipart/alternative;
boundary="--==_mimepart_64ddd3862ce4b_17aa1b6c897e";
charset=UTF-8
Content-Transfer-Encoding: 7bit
X-OpenProject-User: USER1 SN1
X-Mailer: OpenProject
X-OpenProject-Host: openproject.dev.EXAMPLE.FOO
X-OpenProject-Site: Openproject
Precedence: bulk
Auto-Submitted: auto-generated

Content-Type: text/plain;
charset=UTF-8
Content-Transfer-Encoding: 7bit

Hello USER
You have 2 unread notifications including a mention
----------------------------------------------------------------------------------------------------

========================================================
= #471147 Blabla, bblablabla. Foo BAR batz =
========================================================

Watched, Mentioned: Updated at 08/17/2023, 07:40 AM by Another User

----------------------------------------------------------------------------------------------------

--
```

There&#39;s a blank line inside the header section before `Content-Type:` which still - at least I think so - should be a header.

###

### What is the expected behavior?

No blank lines inside the header section in the mail&#39;s data, so mailclients are able to interpret headers correctly.

### Important note

_Please note that unless you are a contributor to OpenProject, you can no longer edit this bug report after saving. You can still add new comments, but no longer add any new images or other attachments. Please make sure that all necessary information and attachments are added, and the following attributes are set:_

### **Logs** Begin of the insertion

End of the insertion Begin of the deletion



End of the deletion ### Screenshots and other files

_See example mail above_

### Environment information

**OpenProject installation type**

* [ ] Hosted cloud edition
* [x] Packaged installation
* Ubuntu 22.04.3.
* [ ] Docker All-in-one container
* [ ] Docker-compose installation
* [ ] Other (please specify)

**OpenProject version**

**OpenProject Begin of the insertion12.5.8**End of the insertion Begin of the deletion 12.5.8** End of the deletion

**Browser**

* [x] Chrome
* [x] Firefox
* [ ] Safari
* [ ] Mobile Safari
* [ ] Other (please specify)

**Language**

_DE / EN_