How to allow postfix to parse recipient address with percent signs in them?

I am having a mail delivered to a postfix mail server. That mail got the following address: else%2something@domain.com (It is basically a url encoded version of else+something@domain.com, which should be valid by RFC.) The sender’s mail server is being told to go way with this message: NOQUEUE: reject: RCPT from randostring.outbound.protection.outlook.com[…]: 454 4.7.1 <else%2something@domain.com>: Relay…

Debian Buster – My network is configured as static IP but I am still receiving a DHCP address

I have a very simple /etc/network/interfaces file: auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 192.168.5.5 netmask 255.255.255.0 network 192.168.5.0 gateway 192.168.5.100 iface usb0 inet static address 192.168.7.2 netmask 255.255.255.252 network 192.168.7.0 gateway 192.168.7.1 Where I assign a static IP address of 5.5 to eth0. However, upon boot, ifconfig shows…