GmailでDKIM署名してる

いつのまにか。前はSPFとDomainKeysだけだったけど。

DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed;
d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:user-agent:mime-version:to:subject:content-type:content-transfer-encoding;
b=UJk1zBZJ4EDujtTHvSw/IxA4J9Efrm2/d4tGB/L8fcGoWUWEUzCdP3KFmEy6HamyjzsrTphoZnPDd4+UblttFWPy6STYoY/eB6Ixy57HoJZhIxx9ESh3Qd/8eIPzHwv1Jvu52G95alI7cC7zRccSfPZ1pBV9qguOQlsk4Qf6Vcw=