abgelehnt wegen Qualitätsproblemen

IMO, the mail boxes alone would make a nice picture.  The rest of the photo is not as interesting.

The fourth image also seems to have leaning verticals. The flagpole is not vertical. If the flagpole turns out not to actually be vertical in real life, then this is probably not the right scene; Adobe's customers expect perfect scenes as well as perfect photography. (Also, the building edges don't seem to be vertical either).

First image has chromatic aberration. Also perhaps over saturated.

Second image seems to be over saturated, and if you zoom in between 100-200% you'll see that focus is not sharp.

Third image is also oversaturated. 
Fourth image has a lens spot in the sky