Thank you for your kind and quick response. 
I already read these post and hoped for this feature to work. Sadly it doesn’t. Does mailinglist mode count for messages in groups too?
Here you can see the message stream with two messages of mine (1,2):
and how they don’t apear in my mailbox (just the both of Clau.. are received):
This is my mailinglist configuration 
This is my notify configuration for this message thread:
Also checked my Email sent and skipped logs in Admin area… Both are empty
Is there another place in discourse where I can configure it? Some global option… or something
I also tried to answer to the message of Clau… in my email client too, sadly this won’t work too…
Thank you very much in advance
Bren