How to beat Spam filters?

Increasing more and more I am coming across messages like,

"Your submission has triggered the spam filter and will not be accepted."

I create my backlinks manually and respond to the post as if I am actually making a comment on the post. However, I am getting more and more of these types of messages.

I have tired different things like clearing the cache, landing on the domain name and then finding the article, using TOR browser, and staying on the page with my comment for a few minutes. However, nothing seems to work.

And another thing, I made a comment on one website and it went through, so I searched for more posts and tried to make another comment but was flagged for being spam.

Any advise is welcome. I have tried alot but nothing seems to work.

For anyone that is wondering. The problem was corrected.
My website domain has a buyer keyword in it and once I changed the link to one of my web2.0 sites that has a general name, the comment went through.

Check out this thread - http://www.blackhatworld.com/blackhat-seo/black-hat-seo/200989-drupal-comment-spam-filter-problem-solved.html