Printer Wireless, Networking & Internet

Hi all.

Some months ago, i posted the following call for help , but I got only one generic reply that did not solve my problem. Time passed and the problem persists.

In short:

1. The feature "scan to mail" stopped working in autumn 2020, without any apparent changes in my network configuration.
2. More generally, I cannot reach any HP Web Service (If I try to open the Apps page on the front panel, the printer hangs indefinitely, or shows an error message after several minutes). I do not believe it is an authentication problem: I simply cannot reach the service.
3. I tried to connect through *three* different networks and ISPs, but the problem remains the same (so I assumeit is not a network issue).
4. I tried to follow all suggestions found on this forum, obvious and less obvious (including these), but none worked.
5. I suspect the problem may be due to an old firmware (June 2016), so I downloaded and installed the last available one (November 2020 - the time the printer stopped working); unfortunately, the procedure succeeds but the Datecode remains the old one. Obviously, the drivers on my PC are up-to-date.

I absolutely need the "scan to mail" feature, and I am getting very frustrated for this problem.

Now I am running out of toner, and I am seriously considering to buy another printer (not HP) rather than replacing the cartridge.

Hope someone may help (but please avoid obvious answers like "restart your printer" or "check your network settings").

Thanks in advance.