Blogger Introduced Comment Spam Filtering

Now blogger also has a system to fighting with spam. Blogger is one of the biggest blog hosts in the world, it has to deal with huge amounts of spam messages every day. But, until now, bloggers have had to either enable comment moderation or use CAPTCHA. Blogger will now have to go through Google’s filtering system.
According to Saurav Shah and Junho Ryu, Software Engineers,“Commenting is one of the most integral parts of blogging: it’s what makes blogging a conversation, not a monologue. That’s why we are pleased to announce two cool new improvements to Blogger’s comments system: much better spam filtering and the ability to view all comments on your blog in one place”.

"A blog is an open communications system, inviting conversations from all web users. Unfortunately, spammers have been finding their way into these conversations. To fight spam, some of you enabled moderation of all comments or required word verification or login. While somewhat effective, these checks limit real-time conversations around your blog."

"To address this, we’ve integrated Google’s spam filtering technologies into the Blogger comment system. Some of you will notice the new “Comments” tab. (Note: We are gradually rolling this out to all users, so some of you may not see the new Comments tab yet.) In the Comments tab, there is a Spam sub-tab that shows all the comments that are likely spam." 

The comments are split into three categories, Published, Awaiting Moderation and Spam. You can see any comment made on your blog and delete it or remove it from the same page. You can also mark it as spam which will delete it immediately. 

The comments in the Spam inbox are not visible to your readers. Here, you can permanently delete spam comments by selecting them and choosing Delete. You can also mark comments as Not Spam that have been incorrectly classified as spam (what we call the “false-positives”). Choose Not Spam and the selected comments will be moved out of the spam list and will be immediately published on your blog.

Blogger now leverages Google’s spam filtering technologies, used in Gmail for example, for comments. Any suspicious comment will be moved to the Spam tab and will not be displayed on your blog. From the Comments section you’ll be able to remove the spam comments or mark them as Not Spam if that is the case.