- Can I leave my email address as it is [...]?
The use of "[]" is optional ("SHOULD"), so this is valid:
email:contact@example.com
Also the example you mentioned is valid.
I wanted to set up a httpd first. Luckily I left that. I wrote the fingerprints in the DNS. Would like to have as little software or services as possible on the relays.
just to clarify: there is no requirement to run additional software on the relay. the url can point to an arbitrary domain that you manage.
kind regards, nusenu