Does Kumo recognize TLS certs for wildcard domains

opensrs provides mailbox accounts for mail providers

and that’s how they’re doing it… i have a ticket open with them about this

what I suggest in the meantime is that you disable the use of TLS for that domain

yes, i did that… set it to be OpportunisticInsecure for that domain

@free-spirited-yorksh Did you have thoughts on making Opportunistic default to Insecure, and have OpportunisticSecure as an option?

Yes; I strongly believe that insecure should never ever be the default.

you are of course welcome to set the default for your deployment to insecure if you prefer that

My testing has all been with a single subdomain and not CNAMED.
IE: mta1.kumomta.com
I can put some more extensive testing. on my “todo” list.