Though it looks live you’ve found your solution, for the benefit of others I wanted to chime in that using gmail to “combine” mailboxes is quite handy.
Over the years I’ve managed to accumulate at least two “secondary” addresses that are too important for me to abandon (and a few that were inconsequential enough that I could eventually stop using them). I’ve configured gmail to retrieve mail from those boxes, so all my mail is in one place, and I only have to deal with one interface, one set of login credentials, etc. I also like the fact that I don’t have to worry about losing my mail with a drive failure, and that I can acess it anywhere.