Which address are you using for PDBsum?

https://www.ebi.ac.uk/thornton-srv/databases/cgi-bin/pdbsum/GetPage.pl?pdbcode=index.html works fine for me.

I'm using the same address. I can submit the pdb file too.

But I don't receive any mails saying the job is finished with the results page link.

That's why I am looking for an alternative

Hi,

you can try to use "ContactMap" in VMD.

Maybe pymol or rasmol. Maybe jmol.

Leview is another one

For interaction analysis, you can use the Discovery Studio Visualizer software. By using this software you can easily visualize and do interaction analysis of protein-small molecule, protein-peptide, or protein-protein complex.

Could you try on "pymol"