IS THIS A REJECTION OR ACCEPTANCE?

I got an email today from a company that I had submitted my greeting cards to and it states that they have reviewed my materials and yes, this is the style they are seeking for their card lines. However, they did not choose any of the images/cards I had submitted at this time but I could feel free to submit more in the future. What the heck does this mean? It's like saying this is KIND OF what we're looking for but NOT EXACTLY what we're looking for :) Anyway, I need to go mail the check.