DKIM fails at Content-Transfer-Encoding

DomainKeys Identified Mail (DKIM) is used to prevent people from sending spam mails with &ldquo;from&rdquo; mail addresses from your domain; you announce with DNS records that you sign all your mails with a RSA key, and everyone can check whether mails have been really sent by you. For this it hashes (parts of) the body and some headers, and signs these hashes with the private RSA key; the public…