pmg-no-subscription - updates for non-subscribers

deb http://download.proxmox.com/debian/pmg stretch pmg-no-subscription

Q: Can I install Proxmox Mail Gateway on top of Debian Stretch?
A: Yes. See documentation https://www.proxmox.com/en/downloads/item/proxmox-mail-gateway-admin-guide-for-5-x

Steam is dropping official support for Ubuntu, which is currently the world’s most popular desktop Linux distribution.

By removing the 32-bit archive entirely, Ubuntu is nixing the ability for 32-bit software to run on 64-bit versions of Ubuntu — at least, without resorting to complex workarounds like using containers.