Even when you follow the rules and use opt in lists and avoid overly promotional emails, you can get your emails blocked! We recently discovered our emails being blocked because of "spam content" – but it wasn’t us that was reported as the offending culprit.
Our email signatures contained links to our Web pages hosted by Hostgator, a hosting service. Hostgator has one of their other sites reported as a spammer. I researched the IP address on SpamHaus and found that the offender is none other than The Yale Economic Review!
Because The Yale magazine was reported for spam, our sites which are hosted on the same server get tagged as spam! I don’t think many people know this can happen to them.
Evil Spammers: The Yale Economic Review?