Hi, On 28 Jan 2024 at 14:37:43, Marco van Beek via GLLUG wrote: > On 27/01/2024 18:08, Henrik Morsing via GLLUG wrote: > > > > I'm now getting the same from the Land Registry: > > > > I wish there was a test I could do to check what is actually wrong... > > > Okay, so this would indicate that it is more likely something wrong at your > end rather than at theirs. I think that this point, I would start to wonder > if there is anything at your end that is altering the email before it gets > to the DKIM check.
this makes sense. I would also check if DKIM can be verified by, for example, mails coming from gmail.com. In my mail client: I view the headers to see the "Authentication-Results". For an email from gmail.com to my mail server with DKIM I see that it says "dkim=pass". But, note, that DMARC for gmail.com says policy "none" and for the British Gas / Land registry I think that says "policy=reject". So, I wonder, does DKIM verification always fails for Henrik? (e.g. wrong DNS lookups from DKIM, it happened to me). And, for some domains, this is a reject and other domains, is "nothing happens". [...] > Maybe something in your system is altering something in a field that is > being used by the British Gas and Land registry emails, like adding an > "EXTERNAL" into the subject line before the DKIM test? that's a good idea to check as well. For reference, an email that I am checking the headers says: Subject:From:To:Date:message-id:x-mailer-recipientid:fe +edback-id:list-unsubscribe-post:list-unsubscribe:precedence:x-mailru-msgtype:x-campaignid:rep +ly-to:MIME-Version:Content-Type So, if the subject changed before verifying DKIM, it would not pass. Cheers, -- Carles Pina i Estany https://carles.pina.cat
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