Out of office mails in Exchange 2010 (which are ms-tnef), are not signed

[gestature]

Versions

• Windows Server Version: Windows DServer 2008 R2 Standard SP1
• Exchange Version: Exchange Server 2010 14.03.0294.000
• Installed DKIM Exchange Version: DKIM Signer 3.1.0

Description

I set up the DKIM protocole, with DKIM Exchange, to solve the problem of Out Of Office Mails not beeing allowed by external mail servers because of the empty ReturnPath field.

Unfortunatly, DKIM Exchange don't want to sign thos OOO mails, it says : "Message is a System message or of TNEF format. Not signing.".

OOO mails from our Exchange Server are ms-tnef :

Content-Type: application/ms-tnef; name="winmail.dat" Content-Transfer-Encoding: binary

Expected behavior: out of office mails, which are ms-tnef, could be signed

Actual behavior: out of office mails, which are ms-tnef, are not signed.

I'm wondering if anyone has a solution for this problem?

Thank you in advance

[sarthurdev]

You could try disabling the TNEF format on remote messages as stated in the Readme: https://github.com/Pro/dkim-exchange/blob/master/README.md#configuring-the-agent

[gestature]

You could try disabling the TNEF format on remote messages as stated in the Readme: https://github.com/Pro/dkim-exchange/blob/master/README.md#configuring-the-agent

I already configured this but it applies only to "normal" mail. Out of office mails are "system" mails and I can't figure out how to "not send them in TNEF format".

But thank you for you answer. This problem seams to have no solution but in fact nearly noone has this problem so there must be a simple solution. :D

[J0HAN85]

But thank you for you answer. This problem seams to have no solution but in fact nearly noone has this problem so there must be a simple solution. :D

Well I do... And I haven't found a solution as well.