Actually I got four of them and I keep them for further analysis and find for any pattern or any suspicious things.
While the email claimed to came from a well respected company, they are sent from a so-called newsletter server which differs from the company name. The server domain name is not reviewed by SiteAdvisor.com, unknown to AboutUs.org and has concealed WhoIs database record. The server seems to have a web server, but got a 404 error on the main page (duh...). Almost all of the links in the emails points to the newsletter server. A view of the links are fakes - displayed as URLs of third party companies but linked to the newsletter server.
I checked the company website manually via my browser and tries to unsubscribe their email by first using fake email addresses but real domain (which turned up nothing), then my real address - and turned out that I did have opted for their newsletter (somehow). So I unchecked all of the subscriptions and updated it. And do it again for the second time just to make sure my settings are applied. A view minutes later, I got two emails that my settings will take place at least 48 hours. Hmm... So far so good? Or should I cross my fingers?
Anyway, if I keep receiving the newsletter, I would be really, really mad.
"Righteous is always honorable, but honor is not always righteous." - Me ^_^