dmarc report faild ?

Hello Together

Please i have new following Error, from DMARC Report, if i check my domain on example mxtoolbox i dont see any problems.

Any from you know this Eror report, what i need to do to fix this issue?

C:\folder>nslookup 94.237.32.243

Server: dns204.data.ch

Address: 211.232.23.124

Name: wursti.dovecot.fi

Address: 94.237.32.243

--

I check also dkim and spif but i don't see the mistake, i dont want that me Mailserver become seriussly mail problems.

Regards

Mauri

<?xml version="1.0" encoding="UTF-8" ?>

<feedback>

<report_metadata>

<org_name></org_name>

<email>mreport@vmfacility.fr</email>

<report_id>caloro.ch:1503564302</report_id>

<date_range>

<begin>1503477902</begin>

<end>1503564302</end>

</date_range>

</report_metadata>

<policy_published>

<domain>caloro.ch</domain>

<adkim>s</adkim>

<aspf>s</aspf>

<p>none</p>

<sp>none</sp>

<pct>100</pct>

</policy_published>

<record>

<row>

<source_ip>94.237.32.243</source_ip>

<count>1</count>

<policy_evaluated>

<disposition>none</disposition>

<dkim>pass</dkim>

<spf>fail</spf>

</policy_evaluated>

</row>

<identifiers>

<header_from>caloro.ch</header_from>

</identifiers>

<auth_results>

<spf>

<domain>dovecot.org</domain>

<result>unknown</result>

</spf>

<dkim>

<domain>caloro.ch</domain>

<result>pass</result>

</dkim>

</auth_results>

</record>

</feedback>