1. 登録用案内メール

From XX@ap-northeast-1.amazonses.com

Received: from e234-57.smtp-out.ap-northeast-1.amazonses.com (23.251.234.57) ESMTPS

DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple;
        s=rpbi66lyisg7vd5af4u2guxv7odazcpy; d=tobe-community.jp;
DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/simple;
        s=zh4gjftm6etwoq6afzugpky45synznly; d=amazonses.com; t=1702898840;
        h=Date:From:To:Message-ID:Subject:Mime-Version:Content-Type:Content-Transfer-Encoding:Feedback-ID;

Date: Mon, 18 Dec 2023 11:27:20 +0000
From: no-reply@tobe-community.jp

2. amazonses

SPFに抜かりはない。

ap-northeast-1.amazonses.com. 900 IN    TXT     "spf2.0/pra include:amazonses.com -all"
ap-northeast-1.amazonses.com. 900 IN    TXT     "v=spf1 include:amazonses.com -all"

amazonses.com.          900     IN      TXT     "v=spf1 ip4:199.255.192.0/22 ip4:199.127.232.0/22 
ip4:54.240.0.0/18 ip4:69.169.224.0/20 ip4:23.249.208.0/20 ip4:23.251.224.0/19 ip4:76.223.176.0/20
ip4:52.82.172.0/22 ip4:54.240.64.0/19 ip4:54.240.96.0/19 ip4:76.223.128.0/19 -all"

3. tobe-community.jp

こちらからのメールは見かけない。

tobe-community.jp.      300     IN      TXT     "v=spf1 include:mail.zendesk.com ?all"

mail.zendesk.com.       3600    IN      TXT     "v=spf1 ip4:103.151.192.0/23 
    ip4:185.12.80.0/22 ip4:188.172.128.0/20 ip4:192.161.144.0/20 ip4:216.198.0.0/18 ~all"

tobe-community.jp.      300     IN      MX      10 mail12.onamae.ne.jp.
mail12.onamae.ne.jp.    86400   IN      A       150.95.219.17

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