dkim

Yes you can. A DKIM signature looks like this: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=example.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version; bh=M1X/nttSCpN…ttSCpN=; b=SPso8U12ChySEQcnJcvm76…RAxjJFcBI= During validation the selector and domain (selector1 and example.com above respectively) are both used to locate the TXT record with the public key. This is done by merging them with _domainkey in between: selector1._domainkey.example.com In your case … Read more