What I have is a domain, fully hosted, 1 single user, me
+ I created a second user, which has no access to any domains or files, but just can FTP to a folder, outside of the domains area, to where clients can FTP some stuff.
So exampledomain.com is me, (fully hosted) and
just an FTP folder (second user) is the place where clients, may upload stuff, which can not be opened by browser, since it has no domain attached to it. Very important for security reasons of course (.exe, .php, ect.).
My idea was that with CrossFTP I could transfer, a file from a client from the FTP folder, directly in to the fully hosted domain, where the client has a private little area.
With CrossFTP I can connect to both at the same time, and can delete files and such from both FTP connections, only transfering (copy) files would not succeed. Which had error 425. It also after a while blocked ALL (S)FTP to my account and had to KILL all FTP connections and wait a while. My guess is that DH maybe temp disabled FTP, due to attack concerns.
If this is not possible on DreamHost then I must first download the file(s) to my computer and then Upload again to the correct accessable folder in the domain, which is not the end of the world, just extra time and work.