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SPF, DKIM, DMARC - problem of understanding if delivering email via ISP SMTP

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Offline SchulzStefan

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Re: SPF, DKIM, DMARC - problem of understanding if delivering email via ISP SMTP
« Reply #15 on: July 13, 2017, 01:44:50 AM »
Update:

in the output of

# qpsmtpd-print-dns

the DKIM key might be seperated with quotes (''). For STRATO all quotes have to be deleted. It MUST be only one string. This leads to a valid DKIM signature.

regards,
stefan
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Offline ReetP

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Re: SPF, DKIM, DMARC - problem of understanding if delivering email via ISP SMTP
« Reply #16 on: July 13, 2017, 10:26:10 AM »
I think there may be a bug on this subject.

Have a search for dkim in the bug tracker.
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Offline Daniel B.

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Re: SPF, DKIM, DMARC - problem of understanding if delivering email via ISP SMTP
« Reply #17 on: July 13, 2017, 10:42:55 AM »
The bug is about reducing the default key size to 1024, so that quotes are not needed at all (with which I do not agree, but that's another story ;-) ). qpsmtpd-print-dns outputs a bind compatible format, which requires the quotes every 256 chars.
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Offline SchulzStefan

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Re: SPF, DKIM, DMARC - problem of understanding if delivering email via ISP SMTP
« Reply #18 on: July 13, 2017, 10:49:26 AM »
Understood.

But how to deal with this:

2. Test with auth-results@verifier.port25.com brings up:

DKIM check details:
----------------------------------------------------------
Result:         permerror (invalid key: invalid character U+0022 ('"') in base64 data)

I assume you followed https://forums.contribs.org/index.php/topic,53138.15.html

Solved: https://forums.contribs.org/index.php/topic,53138.msg275712.html#msg275712

« Last Edit: July 16, 2017, 12:05:53 PM by SchulzStefan »
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  1. Koozali.org: home of the SME Server
  2. Obsolete Releases
  3. SME Server 9.x
  4. Topic: SPF, DKIM, DMARC - problem of understanding if delivering email via ISP SMTP