I‘m perplexed. I never saw that configuration parameter until now and 
apparently misinterpreted my Postfix logs. Glad this isn’t an issue. Thanks!

> Am 08.02.2025 um 17:42 schrieb Viktor Dukhovni via Postfix-users 
> <postfix-users@postfix.org>:
> 
> On Sat, Feb 08, 2025 at 05:28:31PM +0100, Ömer Güven via Postfix-users wrote:
> 
>>   RFC 7672 says that Opportunistic DANE (security level „dane“, but not
>>   „dane-only“) may accept non-DNSSEC derived MX records be eligible for
>>   DANE on the DNSSEC-signed (e. g. external) SMTP server.
>> 
>>   RFC 7672 Section 2.2.1:
> 
> The primary author of RFC 7672 was also the implementor of DANE support
> in Postfix (and later OpenSSL), with the implementation developed in
> parallel with the specification.  Unsurprisingly, the Postfix
> implementation matches the specification.
> 
>>   This currently isn‘t the case. Even if a socketmap server returns
>>   „dane“, Postfix doesn‘t choose DANE when the MX is retrieved with no
>>   DNSSEC signature.
> 
> This is not true.  See:
> 
>    http://www.postfix.org/postconf.5.html#smtp_tls_dane_insecure_mx_policy
> 
> --
>    Viktor.
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