some types of spam filters note which kinds of content receives higher spam complaints, making them more likely to filter that kind of content as spam. Meaning, if you had a bad list receiving enough complaints to cause a concern, this type of spam filter would tag your content and block you. Your content would be flagged no matter how you send it– regardless of whom you send it to and what IP address you send it over in the future.

Take a look at this beauty below and witness an ESP that is doing it right……

Companies stuck in a batch-and-blast mentality see e-mail as a cost-effective medium, so they may abuse that privilege and end up turning off the consumer with too many or the wrong messages.