matiu bidule on Nostr: npub1h5d04…temws maybe you could take a look to Delta Chat and more precisely their ...

npub1h5d042tzz5gs7hwpnne5ryptw2gvxn8m72kuulmcxfpewkps6jlqrtemws (npub1h5d…emws)
maybe you could take a look to Delta Chat and more precisely their "chatmail server" project that you can run self hosted on a rapsbery or else

https://delta.chat/fr/chatmail