On 05-07-2025 18:50, Kevin Chadwick via Dng wrote:
> 5 Jul 2025 12:28:30 Kevin Chadwick via Dng <dng@???>:
>
>> Yep. From the top of my head. Lets Encrypt. Reverse DNS. spf record and tls indication record.
> Oh, I forgot DKIM records.
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For 4 small volume mail servers I have in use: DKIM, SPF, rDNS record,
DMARC.

Next config update I will add MTA-STS to the mix.