How to view e-mail Internet headers in Outlook

Like most e-mail programs, Outlook offers a way to display the source text of the e-mail or the SMTP header to clearly identify the origin of the e-mail. The Internet headers can also be used to analyze server delivery and encoding.

If you want to examine the SPAM status in the message header of an e-mail with Outlook, the section “X-Spam-Flag” with the X-Spam-Score value is of interest, you will notice that the X-Spam status is completely missing in the Internet headers, although these are given by Spamassassin.

With open the e-mail and go to File -> Properties.

The X-Spam information is simply truncated by Outlook, if you examine the header with another e-mail client, for example using a webmail application, you’ll find the full header. However, Outlook takes the X-Spam-Flag classification into account and moves the message to the Junk E-mail folder if it is received with X-Spam-Flag: YES, as long as the default setting in the Junk E-mail options has not been changed.

X-Spam header truncated snippet in Outlook:

Authentication results: mta-cu121.middle.org;
	dkim=pass (2048-bit key) header.d=outlook.com header.i=@outlook.com header.b="NDq3pzWF"
X-Spam-Flag: NO
X-Spam Score: 0.501
X-Spam Level:
X-Spam Status: No, score=0.501 tagged_above=-999 required=6.2
	tests=[DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1,
	FREEMAIL_FROM=0.001, HTML_MESSAGE=0.001, MIME_HTML_MOSTLY=0.1,
	RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001,
	SUBJ_ALL_CAPS=0.5, TVD_SPACE_RATIO=0.001]
	autolearn=no autolearn_force=no
Received: from mta-cu121.middle.org ([127.0.0.1])
	by localhost (mta-cu121.middle.org [127.0.0.1]) (amavisd-new, port 10024)
	with ESMTP id xiFVOnehSqeY for <john@foo.com>;
	Tue, 10 Jan 2023 15:41:15 +0100 (CET)

DisableOffice365SimplifiedAccountCreation

Outlook from Microsoft 365 (Office 365) has a simplified Auto Account Setup wizard, the option to manually create an account no longer appears. However, there is a possibility to make the Outlook option for manual account setup available anyway.

1. Close Outlook if it is already open.
2. Next, open Registry Editor with the Windows+R keys and type regedit and click OK.
3. In Registry Editor, navigate to the following key: HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Setup
4. Right-click to open menu and click New to select DWORD (32-bit):
5. Rename the new DWORD key with the value : DisableOffice365SimplifiedAccountCreation
6. Double-click the new key to change the value.
7. In the field, enter a value of 1 and click OK.
8. Close Registry Editor and restart Outlook.

It is also possible to activate the Outlook option for manual account setup do perform the REG ADD command.

To do this, open a command prompt with the key combination Windows+Rcmd and click OK.

Insert the following line in the command prompt and press Enter.

REG ADD "HKCU\SOFTWARE\Microsoft\Office\16.0\Outlook\Setup" /v "DisableOffice365SimplifiedAccountCreation" /t REG_DWORD /d "1" /f

Start Outlook and select Manual setup or additional server types.