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I've recently setup a mail server, which will be handling email for multiple people and domains. Appropriate SPF, DKIM, DMARC and ADSP records have been added, yet I'm getting something confusing:

Authentication-Results: mx.google.com; spf=pass (google.com: domain of cydnie@redacted.com designates 6.101.56.24 as permitted sender) smtp.mailfrom=cydnie@redacted.com; dmarc=pass (p=QUARANTINE dis=NONE) header.from=redacted.com
Authentication-Results: de.mx.redacted.com; dmarc=fail header.from=redacted.com

As you can see I'm getting TWO Authentication-Results headers, the latter signifying a fail for some reason. My records are in order, as far as I'm aware:

SPF: "v=spf1 mx a ptr include:_spf.redacted.com ~all"
SPF: "v=spf1 ip4:6.101.56.24/32 ip4:10.10.33.109/32 ip6:2c03:10e0:3:a0::1bc9:2001/64 ~all"
DMARC: "v=DMARC1; p=quarantine; pct=100; rua=mailto:support@reacted.com; ruf=admin@redacted.com; fo=1; aspf=r; adkim=r"
ADSP: "dkim=all"

Any ideas?

  • Why do you have an RFC1918 address in the SPF record? That may be causing an issue. It's also a security concern to expose internal networking addresses. Second, if you're redacting the domain name for security reasons, you may also want to redact the Public IP address as well. – HashHazard Sep 25 '16 at 13:53
  • I'll remove the RFC1918 address - it was for webmail stuff, but no longer needed. The public IP didn't need redacting, I changed it significantly! – Cydnie-Naomi Sep 25 '16 at 14:11
  • Huh, that didn't fix it, still getting double headers, with dmarc=fail. – Cydnie-Naomi Sep 25 '16 at 14:15
  • Yea i wasn't sure if that would fix that particular problem, but it couldn't hurt to remove it. – HashHazard Sep 25 '16 at 14:54
  • @Cydnie... Is your problem solved ? If no, then please update the issues you are facing right now. TXT record for your domain is now showing that you are using outlook.com for sending mails. redacted.com. 145 IN TXT "v=spf1 include:spf.protection.outlook.com ~all" – Gaurav Kansal Oct 30 '16 at 16:47
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Cydnie,

Are your DMARC records correct in DNS?

DMARC lookup applied to redacted.com does not return any DMARC records. rua=mailto:support@reacted.com: incorrect domain name? (should be reDacted.com)

Remove ADSP records. ADSP has been moved to historic: https://datatracker.ietf.org/doc/status-change-adsp-rfc5617-to-historic/

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