はじめに
SPF, DKIM, DMARCの可視化について以下に記載しました。
ここでは、実際に受信したMailing Listのメールから、現時点の対応状況を見てみます。対象とするMailing Listは4つです。
Mailing List #1
- dkim-pass, dmarc=pass, spf=pass
- dkim=fail, dkim-pass, dmarc=pass, spf=pass
- dkim=fail, dkim-pass, spf=pass
- dkim=fail, dkim=pass, dmarc=fail, spf=pass
- dkim=pass, spf=pass
- dkim=pass, dmarc=fail, spf=pass
- dkim=none, dkim=pass, dmarc=none, dmarc=pass, spf=pass
- dkim=fail, dkim=none, dkim=pass, dmarc=none, dmarc=pass, spf=pass
- dkim=none, dkim=pass, dmarc=fail, dmarc=none, dmarc=pass, spf=pass
Mailing List #2
- dkim=pass, dmarc=pass, spf=pass
- dkim=pass, dmarc=none, spf=pass
- dkim=pass, dmarc=fail, dmarc=pass, spf=pass
- dkim=none, dmarc=pass, spf=pass
- dmarc=pass, spf=pass
- dkim=pass, dmarc=fail, dmarc=pass, spf=neutral, spf=pass
- dkim=none, dmarc=fail, dmarc=pass, spf=pass
Mailing List #3
- dkim=fail, dkim=pass, dmarc=pass, spf=pass
- dkim=fail, dkim=none, dkim=pass, dmarc=none, dmarc=pass, spf=pass
- dkim=pass, dmarc=pass, spf=pass
Mailing List #4
- dkim=fail, dkim=none, dmarc=none, spf=pass
- spf=pass
- dkim=fail, dmarc=fail, spf=pass
- dkim=fail, dkim=pass, dmarc=fail, spf=pass
- dkim=fail, dkim=none, dmarc=fail, dmarc=none, spf=pass
- dkim=pass, dmarc=pass, spf=pass
- dkim=fail, spf=pass
- dkim=none, sof=pass