Harry Potter characters is a perfectly reasonable server naming scheme. Server names should be easily recognisable but not tied to any particular service/project/function on that machine (as the server may be used for other things later etc)
Speaking from experience, I'd recommend not choosing protonmail because it is very difficult to cleanly stop paying and leave - forwarding mail to another address is a paid feature. It's also not very standards compliant (no IMAP/SMTP support without running a buggy bridge). Their security features are mostly useless and better security can be achieved on standards-compliant services if you try.
I can't spell when typing fast :P
here we go, in no particular order:
Harry Potter characters is a perfectly reasonable server naming scheme. Server names should be easily recognisable but not tied to any particular service/project/function on that machine (as the server may be used for other things later etc)
See RFC 1178: https://www.rfc-editor.org/rfc/rfc1178
Speaking from experience, I'd recommend not choosing protonmail because it is very difficult to cleanly stop paying and leave - forwarding mail to another address is a paid feature. It's also not very standards compliant (no IMAP/SMTP support without running a buggy bridge). Their security features are mostly useless and better security can be achieved on standards-compliant services if you try.