On Mon, Dec 13, 2021 at 9:46 AM Slavko via mailop <mailop@mailop.org> wrote:
> Hi, > > Dňa Mon, 13 Dec 2021 18:19:07 +0100 Alessandro Vesely via mailop > <mailop@mailop.org> napísal: > > > Is it customary to reject messages with multiple addresses in From:? > > Why? > > AFAIK, DMARC works with only one From: address, thus sites which > are verifying DMARC tends to reject multiple addresses in it. > Basically, yes, DMARC doesn't handle multiple from addresses, otherwise one could do From: m...@whatever.com, accou...@google.com and which domain would this be considered from? I guess one could evaluate DMARC for both. We also reject multiple From headers, which is much more common but basically always an error or spam. Brandon
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