On 2017-02-15, Marco Gaiarin <gaio@???> wrote: > Mandi! Mike Brudenell
> In chel di` si favelave...
>
>> Also, using local knowledge of our setup, the systems we use on campus are
>> *highly* unlikely to generate outgoing emails with multiple addresses in
>> the RFC5322.From so I'm comfortable with using its (single) address to
>> select the signing key.
>
> I was not aware that From: can be multivalued! ;-)
>
>
> To narrow down some corner-cases, there's some way to ''count'' From:
> header, preventing DKIM signature if count <> 1?
${domain:$h_from} comes up blank if there are multiple addresses.
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