We have a company website which is hosted by an external 3rd party company. Our marketing dept got sent a URL that links into part of the website, this URL only worked when outside our domain, and didn't work for anyone within the domain and just came back with 404 error message.
The URL they sent went http://ourcomapny.com/.....etc
If I added www into the URL it worked within our domain (EG: http://www.ourcompany.com/
I'm not sure why this made such a difference, maybe DNS ??? and if anyone could point me in the right direction to be able to prevent this from happening that would be greatly appreciated.