https://weblogs.asp.net/owscott/iis-url-rewrite-rewriting-non-www-to-www from bare domain to www
I had to research the details about why use www or not. I had the idea that http://www.it-pro.nl looks 'old' and http://it-pro.nl looks 'better' or more 'modern'. As it turns out, there are a number of services, checks and other web related items that strongly suggest to use a www in front of a domainname. It is however not mandatory. I read some articles and decided that i make my websites start with www in front of it.
Some articles about the www variant versus 'bare' domainname:
http://www.yes-www.org/why-use-www/ and https://devcenter.heroku.com/articles/apex-domains
I was researching this to understand choices with SSL certificates: SSL
Traffic routed over SSL behaves, at the DNS level, identical to unencrypted traffic and suffers from the same naked domain limitations.
Applications requiring SSL encryption should use the ALIAS/ANAME configuration on the root domain. Subdomain redirection will cause a browser error when the root domain is requested over SSL (i.e.
https://example.com). A note on email validity and regex for validation. http://www.regular-expressions.info/email.html
remove your old windows version (windows.old folder)