Selling an Anti Spam solution sending Spam?

So, this mail arrived to my “Junk” mailbox, for those that don’t speak spanish it says:

You are reading this because your email service allows unwanted emails.

Is estimated that every person spends between one and three working days days just in this activity, for one person with an income of 6,000 the cost is approximately 580 pesos annually without taking care the cost of stop doing the productive tasks in that time…

First, I got to this mail because I was cleaning the junk mail (deleting and yes, I know this is done automatically by the Mail server, but I wanted to delete it anyway) and when the mailbox was clean this message arrived so it was the only one and was the lucky one. read more