I have a catch all and give a different email address to every company I work with. This way if someone sends me spam or unsolicited emails I know who it is and can block it easily. With that said MagneticOne (seller of Magentic one Store Manager and other doo doo magento extensions and software) sells your info to spammers.
Here is the company in question:
Here is more proof of it on their own forum with people complaining:
I just replied to you in facebook with your original message, will repeat here also - As a director of MagneticOne I can officially assure you that we don’t provide in any manner details about our customers to third-parties.
We do value netiquette and don’t use or send spam ourselves in any manner.
You pointed to message in our forum which was made in 2009, I can’t recall details now - 3 years already, but one thing remains unchanged - we value our customers business and make our best to provide best tools to manage it.
If you think something else can be done at my end - please feel free to email me at ruslan [at] magneticone.com or right in Facebook.
Me, personally, and MagneticOne as a company, make our best to use every complain as a chance to improve our product, service or processes, but in this case I can suggest only use Block button in GMail and move forward.