On 20-04-2023 14:05, White, Daniel E. (GSFC-770.0)[AEGIS] via dovecot wrote:
From headers:
Received: from BL0GCC02FT014.eop-gcc02.prod.protection.outlook.com
(2a01:111:f400:7d05::209) by CYXPR09CA0010.outlook.office365.com
(2603:10b6:930:d4::15) with Microsoft SMTP Server (version=TLS1_2,
cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6319.25 via Frontend
Transport; Thu, 20 Apr 2023 11:49:06 +0000
Authentication-Results: spf=softfail (sender IP is 63.88.93.251)
smtp.mailfrom=open-xchange.com; dkim=fail (signature did not verify)
header.d=open-xchange.com;dmarc=fail action=oreject
header.from=open-xchange.com;compauth=none reason=452
Received-SPF: SoftFail (protection.outlook.com: domain of transitioning
open-xchange.com discourages use of 63.88.93.251 as permitted sender)
*From: *Aki Tuomi aki.tuomi@open-xchange.com *Date: *Thursday, April 20, 2023 at 07:49 *Subject: *[EXTERNAL] Re: Mailing list is being Spam Filtered by O-365
On 20/04/2023 14:18 EEST White, Daniel E. (GSFC-770.0)[AEGIS] via dovecot <dovecot@dovecot.org> wrote: Is there any chance that SPF and DKIM records could be added to appear in the headers ? The gubba-mint folks are getting extremely medieval about email security.Um? Those already are added? Or what do you mean?
Aki
Wietse Venema gave this answer on the same question on the postfix mailinglist:
" The list server adds its own DKIM-Signature: on behalf of the domain postfix.org, AND it adds ARC headers and Authentication-Results: for the message as received before modiification and redistribution.
However it does NOT remove existing DKIM-Signature: headers that are no longer matching header and body content. "
I would guess the same applies for this list.
- Kees.
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