First of all: external IPv4 addresses of Ziggo consumer customers are Blacklisted by Spamhaus Zen. See the explanation after: Spamhaus Zen Reports Dynamic Ip Addresses. This is not a problem.
Communicating this to abuse@ziggo.nl is obviously not needed.
Pasi refers to the fact that you may even not have an own external IPv4 address.
This can happen when:
- you have a Connectbox Modem/Router that is not in Bridge Mode for Modem only Usage of the Box combined with a Router of your own; and
- you run IPv6 DS-Lite firmware on this Connectbox.
In that case a so-called CGNAT (aka AFTR) Server IPv4 address is associated with IPv4 Internet connections you need to make. That address is shared with other users of DS-Lite and can change frequently.
You can check the availability of DS-Lite on the Info Page. If it looks like the included image, you indeed have DS-Lite (Connectbox has IPv6 address only).
Otherwise it’s either Full Dual Stack Firmware (Connectbox has both IPv4 and IPv6 addresses) or it’s running IPv4 only.Firmware.
What do you see?
Can you please give a link to your hosted Web Site, for testing it from here?
For simplicity, we can look into the Email problem, later on.