Mike Brudenell <mike.brudenell@???> (Mi 25 Jan 2017 10:53:18 CET):
…
> Hence it would be a very good idea to select the domain for the DKIM
> signature you generate based on the RFC5322.From address.
The RFC5322.From header may contain multiple addresses.
If the From: field contains more than one address, the Sender: field
*must* be present. So, I believe, you should check From: *and* Sender:
Best regards from Dresden/Germany
Viele Grüße aus Dresden
Heiko Schlittermann
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