On 6/11/2014 11:52 PM, Vlatko Salaj wrote:
> delegated domain inclusion in DKIM-D header is optional,
This is a reading of the draft specification that appears to be
incorrect: the DKIM-Delegate proposal always specifies target domain
names for delegated operation.
What is optional is the method of specifying them. They can be
specified overtly, in the DKIM-Delegate header field, or they can
default to the set of domain names in recipient header fields, such as
To and CC:
3.2. Specification
2. ... It can also identify the specific
domain(s) with which it wishes to claim an ephemeral
relationship; absent this indication, the list of candidate
domains is implicit from elsewhere in the message header (see
below).
and
3.3. Syntax
...
t= Delegation target (plain-text; OPTIONAL). This value is a comma-
separated list of domain names to which the authority to sign on
behalf of the Author domain is being delegated. When not present,
this list is inferred from the domain names present in the
recipient fields (To, Cc) of the header.
> and considering it requires some kind of whitelist from which
> its to draw a list of domain it should include, compared 2 those
> it should not, it is most probably not gonna be used.
DKIM-Delegate does not need or use any externally-maintained list.
d/
--
Dave Crocker
Brandenburg InternetWorking
bbiw.net
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