Please direct me to a source explaining why malicious network traffic is exempt from net neutrality. Under the net neutrality definition linked above, blocking specific ports is a clear violation.
Also, the port 25 ban directly affects legitimate customers. At least for Verizon, port 25 is blocked for residential customers, but it's not blocked for commercial customers. Over the past decade, many residential customers have called to enable port 25 so they can run their own mail server, and I've read Verizon refuses to unblock the port. Verizon's "solution" for them is to upgrade to their commercial package where it's not blocked.
Also, the port 25 ban directly affects legitimate customers. At least for Verizon, port 25 is blocked for residential customers, but it's not blocked for commercial customers. Over the past decade, many residential customers have called to enable port 25 so they can run their own mail server, and I've read Verizon refuses to unblock the port. Verizon's "solution" for them is to upgrade to their commercial package where it's not blocked.