A self hosted black box spam filtering solution that I can expose as a rest service. My definition of spam includes abusive and promotional content for now.

What I've found:

1. Implementations and plug n play solutions for SMTP servers targeted for e-mail spam. (Apache spamAssasin for instance)

2. Submissions to online competitions for instance https://www.codeproject.com/Articles/1229597/Detecting-Spam-with-Azure-Machine-Learning.

2. A lot of beginner projects implementing xyz classification algos.

I am looking for a pre-exisiting solution (a well trained model maybe), preferrably open source.