Hello, could you pls. think about making mass message within ally look differently then single message?
This way recipients could see its meant to all and sender dont have to use MM (mass message in english, HZ in czech, etc.) and sometimes they forget to do that (or on purpose...).
Also sometimes CLEVER members fake MM but send manualy only to few picked ones.. that thay have to "all" contribute and send resources, etc.
I think new icon or system marked different type of message would be nice to help us all
Also as in web-mail, outlook, etc. you can see recipients (To, Copy to..), not hidden ofc.
This part would be nice also.. so recipients see who was included to "INFO".