Vivaldi has both a Webmail (as in an Email service online like GMail) and Vivaldi Mail (AKA M3) that is an Email Client built into Vivaldi and you don't have to use Vivaldi Webmail to use it. Source: over 1 year ago

So what do you see? Can you post a screenshot? Are you maybe looking at webmail? The instructions you posted are for the integrated mail client, not for the webmail.vivaldi.net webmail interface. Source: almost 2 years ago

The problem is you want a free provider. The only one I know of which meets your requirements is Vivaldi mail. I don't know if it's good. The company is reputable and worthy of trust. It also offers an email client embedded in its browser. Source: almost 2 years ago

Then browse to https://webmail.vivaldi.net and be happy. Vivaldi Webmail is totally independent of the email client integrated in the web browser, everything else still works the same. The integrated mail client can download / sync emails with any POP3 or IMAP account, among them also the webmail service Vivaldi offers. Source: about 2 years ago

I'm using the Vivaldi browser and they offer a free email service: https://webmail.vivaldi.net/. Source: over 2 years ago

If one were to be so inclined one could install phoneleash https://phone-leash.com/ on a phone and have it forward the messages to an email distribution list. Source: almost 2 years ago

No experience using, just aware of it. Https://phone-leash.com/. Source: over 2 years ago