On 3/12/25 1:14 PM, Bierhoff, Florian via mailop wrote: >> Do you have any idea whether this downgrading is deliberate or just an >> automated consequence of the spammers being better at using ED25119 >> signatures ? > I sadly didn't get too much details on why and at which point the reputation > goes down. > > I know, that the involved MTA marks the ED25119 signature verification result > (even though it isn't actually verified) with an explicit 'fail' instead of > 'neutral'. > Analyzing the DMARC reports we received from this MTA we saw that the overall > DKIM result ended up as a 'pass' though.
I have seen this with older versions of Exim adding two Authentication-Results headers, one failed and one passing. Kind regards Philipp Kern _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
