We now have enabled muc and all XEPs required by conversation. groups.poddery.com is the muc address.
diasp.in prosody log shows Forbidding insecure connection to/from groups.poddery.com
I'll update poddery.com certificate to include groups.poddery.com as well.
certificate updated and now diasp.in can connect to groups.poddery.com
Now MAM is active for muc as well. I had to use prosody 0.10 nightlies for this to work.