Are these valid email addresses?

Question

I found this samples of URL and email address, and found these.

1. user@subdomain.example.com/test/
2. user:password@subdomain.example.com
3. user:password@subdomain.example.com/test/index.html

Are these valid(possible) email addresses?

Answer 1

The addresses are illegal.

The local part of an email adress can not contain : except in a quoted part.

The domainname has to be a valid hostname, and as such can not include directory.

As idipous notes the linked page does not indicate that these should be interpreted as email adresses.

Answer 2

These are not email addresses. These are ssh connection statements or http connections or with no protocol at all pointing to a particular directory on the server. For example if you want to use scp you write something like

scp test.txt user@myhost:/dirtocopyto