raintrees (ancap in nw-cali) on Nostr: npub1k9st5…6flpt might be as simple as adding: ...

npub1k9st5jq0qxx9ru5th6y2t8kq4lqe3mh63fplmfeqje7rsp026uuqe6flpt (npub1k9s…flpt) might be as simple as adding:
+include:mx.hover.com.cust.hostedemail.com
after the "relay.mailchannels.net" part and before the ~all part, spaces in between each entry.

DKIM is another separate step.