Mail::MIMEDefang::DKIM is a module with a set of DKIM related methods called from mimedefang-filter to operate with DKIM.
Returns a mail header and the DKIM signature for the message. The method accepts the following parameters:
The path to the private DKIM key
The algorithm to be used to sign the message, by default is 'rsa-sha1'
The method used to sign the message, by default is 'relaxed'
The domain to be used when signing the message, by default it's autodetected
The selector to be used when signing the message, by default it's 'default'
The headers to sign, by default the headers are:
From Sender Reply-To Subject Date
Message-ID To Cc MIME-Version
Content-Type Content-Transfer-Encoding Content-ID Content-Description
Resent-Date Resent-From Resent-Sender Resent-To Resent-cc
List-Id List-Help List-Unsubscribe List-Subscribe
List-Post List-Owner List-Archive
Verifies the DKIM signature of an email. Return value can be "pass", "fail", "invalid", "temperror", "none". In case of multiple signatures, the "best" result will be returned. Best is defined as "pass", followed by "fail", "invalid", and "none". The second return value is the domain that has applied the signature. The third return value is the size of the DKIM public key. The forth return value is the value of the "b" tag of the DKIM signature.