Will Yahoo let me store messages outside of Yahoo?
I use Thunderbird, and I'm very happy with it. One thing I do routinely is use filters and similar devices to store messages outside my Cox account's message space. For example, all messages sent via my Cox account, as well as other email accountsm are stored in another email-provider's storage space; all incoming Cox emails containing the word "unsubscribe" are stored in another folder ("subscriptions") on another provider's storage space, so I can view them when I can and they don't fill up my inbox.
Will I be able to do this with Yahoo email?
(Please note. I deliberately avoid email apps on mobile devices, except MacBooks, because I have not found a mobile app that affords this level of functionality. So, I'm really only talking about Thunderbird on MacOS.)