I have not had a problem with Superheromail until the past month (so I don't think, personally, that it is a "dangerous" site). I was able to speak by phone to someone with the company a few weeks ago, and he explained that there was a license problem, but that they would be coming back up--but may have to charge for services, since they are losing money because people choose "block ads." I recently was able to access my email, and I thought everything was fine, but now I am having trouble again being able to access the site. 'm hoping it will be back up soon.

I have not been able to log in for the past week at all and past 2 or 3 days get redirected to this page ( https://mail.superheromail.com/admin/acp.php?s=license_error) with this message: The system detected a license problem!

License Status: Error
Message: Bad License Number Format

I can only tell you that I use WOT (World of Trust) and when I tried to check it for possible straggler emails a while back, it came up with a RED warning, said they had let their security certificate lapse some months ago, called it a "Dangerous" site and basically told me "Don't go there."