Mail not delivered after disabling DNSSEC

Maintenance
4

That seems correct.

See also: “Selective availability of STARTTLS is not compatible with DANE. Make sure that either STARTTLS is always on, or DANE TLSA records are NOT published for your domain. Keep in mind that STARTTLS may be disabled by a proxy such as “spamd” or similar, that sits between remote clients and your SMTP server.”

However, it seems not possible to do that in MiaB. And if you do it manually, it gets overwritten when you update MiaB.