Dkim brokes when i add "message ID" in tag "h"

[MaxLucky]

Dkim brokes when i add "message ID" in tag "h". I am using exim. In file i wrote $mail->MessageID = "";

Before:

After:

what could be the problem?

[Synchro]

How are you adding to the h tag?

[MaxLucky]

PHPMailer.php

line 4022

[Synchro]

There's not enough to go on here. That line number is in the middle of finding MIME types. For debugging DKIM, I'd recommend using the unreleased master branch version which has some extra DKIM features to see exactly what you're signing, see PR #1468 for further info.

[MaxLucky]

Сan you give more details? What exactly is necessary to write in my case?

[gwi-mmuths]

@MaxLucky you can check https://github.com/PHPMailer/PHPMailer/blob/master/examples/DKIM_sign.phps.

At the moment it's not possible to add message-id. Using current master supports adding custom header only.