Fediver

Authentication-Results: mx.cloudflare.net;
    dmarc=none header.from=suits-law.jp policy.dmarc=none;
    spf=pass (mx.cloudflare.net: domain of postmaster@sv505.xserver.jp designates 120.136.10.6 as permitted sender) smtp.helo=sv505.xserver.jp;
    spf=pass (mx.cloudflare.net: domain of rmc@sv505.xserver.jp designates 120.136.10.6 as permitted sender) smtp.mailfrom=rmc@sv505.xserver.jp;
    arc=none smtp.remote-ip=120.136.10.6