PostJobFree AutoModerator

Recently we implemented PostJobFree AutoModerator. It screens every job posting and tries to figure out if posting is appropriate or unwanted.
Now most of the spam/scam is deleted automatically, which is nice and saves us and job seekers lots of time.
PostJobFree AutoModerator also checks private messages to minimize spam.

Q: How do you know it is spam?
There are multiple signs of problem postings:
- Email that we blocked in the past.
- IP address that we blocked in the past.
- Web site name that we blocked in the past.
But these are obvious signs.

More advanced spam identification feature is based on attempt to read content of job posting.
We calculate what words are typically used by spammers. Here are some examples of scam/scam words: clicking, dads, mom, quitting, spell, legit.

Q: So you delete repetitive postings?
We delete repetitive spam postings. But not only repetitive. Even if job posting is only somewhat similar to other spam postings – AutoModerator is able to recognize it as spam&scam.

Q: Is there some public service or Google API that tells you that text is spam?
I’m not aware of such service. I also don't think that Google would share their spam dictionary. They need to protect such dictionary for their internal use.