Vivaldi offers some sort of community. I tried signing up, but it keeps asking for an email address. Since it will not allow anything @vivaldi.net but literally @anything else I deduced that you need some other email account. So anything other webmail service that works well with Opera?

I am accessing my email directly over the respective internet sites, no clients, nor programs in between. At first I was with GMX. Then they updated and when I open something in a new tabs, the top bar (with the logout button) disappears. I also tried hushmail, and it, too, cannot properly deal with opening extra sites in new tabs.

So, what webmail providers can handle the opera browser? As I said, I want to access my email directly, and I frequently use the "open in new tab" function. Any advice would be appreciated.