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comp / comp.mail.sendmail / Re: DKIM failures and SPF questions

SubjectAuthor
* DKIM failures and SPF questionsKnute Johnson
+- Re: DKIM failures and SPF questionsHQuest
+- Re: DKIM failures and SPF questionsMarco Moock
`- Re: DKIM failures and SPF questionsnone

1
Subject: DKIM failures and SPF questions
From: Knute Johnson
Newsgroups: comp.mail.sendmail
Organization: A noiseless patient Spider
Date: Thu, 22 Feb 2024 15:08 UTC
Path: eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
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
Organization: A noiseless patient Spider
Lines: 15
Message-ID: <ur7o0p$3u2fu$1@dont-email.me>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Injection-Date: Thu, 22 Feb 2024 15:08:09 -0000 (UTC)
Injection-Info: dont-email.me; posting-host="238bb02f0f229c6227f397866961260f";
logging-data="4131326"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19OB61d81qsg63SFXGEJOEa"
User-Agent: Mozilla Thunderbird
Cancel-Lock: sha1:DLVsKud739MfwWl4zcLj4ZnMu4U=
Content-Language: en-US
View all headers

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

Subject: Re: DKIM failures and SPF questions
From: HQuest
Newsgroups: comp.mail.sendmail
Organization: novaBBS
Date: Thu, 22 Feb 2024 15:24 UTC
References: 1
Path: eternal-september.org!news.eternal-september.org!feeder3.eternal-september.org!i2pn.org!i2pn2.org!.POSTED!not-for-mail
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
Organization: novaBBS
Message-ID: <64a97ff4663d173f3eca5e0955d287d3@www.novabbs.com>
References: <ur7o0p$3u2fu$1@dont-email.me>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 8bit
Injection-Info: i2pn2.org;
logging-data="3733852"; mail-complaints-to="usenet@i2pn2.org";
posting-account="t+lO0yBNO1zGxasPvGSZV1BRu71QKx+JE37DnW+83jQ";
User-Agent: Rocksolid Light
X-Rslight-Posting-User: 3d3517e5dd24387fdf8da64199401ea731577ab2
X-Spam-Checker-Version: SpamAssassin 4.0.0
X-Rslight-Site: $2y$10$iNKXz5j4jIVkPowhYqTGB.JHeC1PMVo6QXUyoLhle7ZgIpmjgdTUW
View all headers

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.

Subject: Re: DKIM failures and SPF questions
From: Marco Moock
Newsgroups: comp.mail.sendmail
Organization: A noiseless patient Spider
Date: Thu, 22 Feb 2024 16:06 UTC
References: 1
Path: eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
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
Organization: A noiseless patient Spider
Lines: 16
Message-ID: <ur7rei$3v00s$1@dont-email.me>
References: <ur7o0p$3u2fu$1@dont-email.me>
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Injection-Date: Thu, 22 Feb 2024 16:06:42 -0000 (UTC)
Injection-Info: dont-email.me; posting-host="ec8cb4258d72532d4d9a319eeee42cf0";
logging-data="4161564"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19qPKiBjtz8eRSUuXGPTs9Y"
Cancel-Lock: sha1:mb7Y/vkHA2p65fb0ma47hVlqVac=
View all headers

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

Send spam to muell456@cartoonies.org

Subject: Re: DKIM failures and SPF questions
From: none
Newsgroups: comp.mail.sendmail
Organization: A noiseless patient Spider
Date: Thu, 23 May 2024 16:25 UTC
References: 1
Path: eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: hzcnjkx656@tormails.com (none)
Newsgroups: comp.mail.sendmail
Subject: Re: DKIM failures and SPF questions
Date: Thu, 23 May 2024 18:25:01 +0200
Organization: A noiseless patient Spider
Lines: 18
Message-ID: <v2nqku$1r4pl$1@dont-email.me>
References: <ur7o0p$3u2fu$1@dont-email.me>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit
Injection-Date: Thu, 23 May 2024 18:25:02 +0200 (CEST)
Injection-Info: dont-email.me; posting-host="8f9179c490b4f5f203d5e1dad8ac7a7d";
logging-data="1938229"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19geSBa4KBngfDnbks1s5rp4FQSBLOey6eixn7zlrQQeA=="
User-Agent: Mozilla Thunderbird
Cancel-Lock: sha1:vA0+oIselFLdJlgXtE9ir8hkWB0=
Content-Language: en-GB
In-Reply-To: <ur7o0p$3u2fu$1@dont-email.me>
View all headers

> 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,
>

I have also 20% failing, most of this is outlook.com/sendgrid. Seems to
be known

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