hi supsystic, I didnt change anything onn my site and suddenly the form stopped working. acording to the hosting company they didnt change anything.
When I tested the function in the settings menu the mail worked.
The probelm lokked like this:
Filling out the form like before and after I click on send, the site kind hangs and nothing happens.
After upgrading to 1.16 then the problem is gone, not sure what you fixed in that update, but now it works.