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DKIM failures and SPF questions

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From: knute2024@585ranch.com (Knute Johnson)
Newsgroups: comp.mail.sendmail
Subject: DKIM failures and SPF questions
Date: Thu, 22 Feb 2024 09:08:09 -0600
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by: Knute Johnson - Thu, 22 Feb 2024 15:08 UTC

I have sendmail 8.17.1.9 running my personal email accounts. I have set
up DKIM and have specified a DMARC record in my DNS. I have that
configured to send me status emails. My question is why I have so many
failures. The message I get often show failures of DKIM but SPF passes.
There is no explanation why they failed. In the _dmarc record I have
p=quarantine and ptc=100. My SPF record specifies -all.

The failure rate is probably 20% on DKIM and hardly ever on SPF. Do I
need to look for something here?

Thanks,

Knute Johnson

Re: DKIM failures and SPF questions

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From: hquest@hquest.pro.br (HQuest)
Newsgroups: comp.mail.sendmail
Subject: Re: DKIM failures and SPF questions
Date: Thu, 22 Feb 2024 15:24:53 +0000
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by: HQuest - Thu, 22 Feb 2024 15:24 UTC

First and foremost, not sponsored. Those are a few tools I've found out there that helped me troubleshoot these and other problems myself.

https://dkimvalidator.com/
https://easydmarc.com/tools/
https://dmarcian.com/domain-checker/

This might give you some hints on where to look next.

Re: DKIM failures and SPF questions

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From: mm+usenet-es@dorfdsl.de (Marco Moock)
Newsgroups: comp.mail.sendmail
Subject: Re: DKIM failures and SPF questions
Date: Thu, 22 Feb 2024 17:06:41 +0100
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by: Marco Moock - Thu, 22 Feb 2024 16:06 UTC

On 22.02.2024 um 09:08 Uhr Knute Johnson wrote:

> I have sendmail 8.17.1.9 running my personal email accounts. I have
> set up DKIM and have specified a DMARC record in my DNS. I have that
> configured to send me status emails. My question is why I have so
> many failures.

Set up another test server that checks DKIM, SPF and DMARC and check
what those tools report in the logs.

--
kind regards
Marco

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computers / comp.mail.sendmail / DKIM failures and SPF questions

Subject	Author
DKIM failures and SPF questions	Knute Johnson
Re: DKIM failures and SPF questions	HQuest
Re: DKIM failures and SPF questions	Marco Moock