reading the documentation it seems to me that the only way to bring a message filter from one account to others is to export the filter and import it into the desired account.
It could be useful, when I decide to create a filter, to have the possibility to automatically spread it across all accounts ?
I am referring in particular to the creation of filters on header "From, To, CC, Bcc" where in each account I have created a SPAM folder (with the same folder name) to trash messages.
Thanks. marvin