When you see a subdomain like webmailb.netzero.net, the first question is whether it's a genuine part of the NetZero service or a fake login page. The good news is that everything about its infrastructure points to authenticity: the site is hosted on NetZero's own network (AS13446), it's been around for years as an ISP offering, and it's clean on all major blacklists. That makes it highly unlikely that this is a phishing site.
However, the security setup has a noticeable flaw. The server still accepts TLS 1.0 and 1.1, encryption protocols that all major browsers stopped supporting in 2020 because they're vulnerable to attacks. For any login page, this is a real risk. If you use this portal, make sure your browser blocks those old protocols or consider enabling a VPN for an extra layer. The site also doesn't set protections like HSTS or clickjacking headers, which many security-conscious services now provide.
So is webmailb.netzero.net safe to use? Yes, as the official NetZero webmail, it's not a scam. But the outdated TLS is a legitimate concern that NetZero should address. If you're a NetZero customer, you can log in, but do so knowing the security is behind modern standards.