To slightly generalize this, I think this feature request boils down to a setting Notify me of my own posts when I'm watching a topic. I don’t think that makes a lot of sense, but on the other hand, I never understood the idea behind mailing list mode echoing your posts
Another way to read this is a request to add an option to expand mailing list mode to messages.
This discrepancy occurs because watching every topic and having mailing list mode on behaves very, very similarly, but differs in the ability to have your own posts echoed – and mailing list mode doesn’t exist for messages.
When using public posts, and mailing list mode is on:
I always get an email if someone else posts.
When I post myself, whether I get mailed a copy or not depends on the choice made when enabling mailing list mode.
When using group messages in a watched inbox:
I always get an email if someone else posts.
When I post myself, I never get an email, and there is no way to enable that. This is because mailing list mode does not apply to messages, and Watching does not trigger notifications for own posts.
This is basically the inverse of the old I don’t want to get notifications for my own (public) posts resentment: This is I do want to get notifications for my own (group) messages.
Pero, ¿por qué no añadir una opción para activarlo, para no tener que explicar siempre a mis usuarios de Discourse que los grupos y las categorías funcionan de manera diferente en el modo de lista de correo? Y para permitir que personas no tan “técnicas” (personas que quieren ver toda la discusión en sus clientes de correo electrónico, incluso sus respuestas) - tenemos muchas de ellas, porque somos un “foro sin tecnología” - puedan participar en las discusiones.