I still use it! I have two separate "Google apps" for two domains, and I just add new domains as aliases. It allows you to separately select DKIM keys for even

I still use it! I have two separate "Google apps" for two domains, and I just add new domains as aliases. It allows you to separately select DKIM keys for even aliased domains. I don't know what's the limit for aliases, but I have at least 5 so far. All still free.