On Fri, May 20, 2016 at 1:36 PM, Jim Popovitch <jim...@gmail.com> wrote:
> On Fri, May 20, 2016 at 4:15 PM, Steve Atkins <st...@blighty.com> wrote: > > > > DKIM is designed to support multiple signatures. There are many > operational > > reasons why having two signatures may be useful (reputation & FBL, > reputation > > migration, author and sender reputation, ...). > > > > Support for multiple signatures in MTAs has taken a while to show up, for > > reasons that don't really matter. > > > > Anyone flagging multiple signatures as problematic is probably clueless. > > > It's not problematic, but since only 1 signature at a time can be > validated any remaining sigs become basically untrusted ascii data. > That's not true at all. All signatures can be valid. The output from such validation is a list of the signing (d=) domains. What decision(s) the receiver makes on the basis of that list is entirely up to them. --Kurt Andersen
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