You might want to transfer your domain to another registrar. I use namecheap and they have a “catch all” option that’s free to use. You just set a single forwarding email and everything sent to your domain arrives there.

I would recommend putting that modem in Bridge mode and getting something like a TP-Link Omada device. I’ve had them for a while and have been really happy.

Old laptops can are actually great servers—hear me out:

• Built in KVM
• Low power consumption
• Battery = UPS for power blips
• SSD (sometimes)
• Wifi + Ethernet = Redundant NICs
• Quiet (sometimes)
• Small form factor