Yes, you have to put the eps file and the corresponding jpg, containing the IPTC data, compressed together in a zip file.
As it is okay for any sites I make the jpeg as close as possible to 15 MB
The name of the zip is not important (I let the default name - "archive, 1, 2, 3, etc., or what else it can be).
If your Fotolia and Adobe accounts are synchronized, you can continue to upload through Fotolia, and the files will also appear on the Adobe site