In most cases, the reason of rejection is told by the webmasters along with the notice of rejection itself.
So, if you find any problem with it, you can also contact the webmaster from the link provided in the message of rejection.
Hope that works.
Violation of content policies includes copied content.
You can have a look at the content posting guidelines here, and make it a practice to follow them to ensure your articles are accepted in future.
A love affair with knowledge will never end in heartbreak!
Live....and Let Live!
We don't accept articles which are just a list of specifications. Only those articles are approved which have something original and unique in their content.
The point is that one should find real quality, unique subject for posting. We are not allowed to post just bla bla in a technical place where people are asking serious questions.
I learned from my experience and I too made a mistake by posting an article on SEO subject. The website friendly told me that I need to concentrate more on unique subjects and product reviews. Thee are plenty of SEO articles in the internet and that is absolutely true.
So be origin and you will be successful man in techulator.