As more and more organisations become concerned about Spam, so they implement Spam filters to stop the Spam from even getting to the recipient.
In doing so they also stop a large amount of innocent email that looks like Spam, but is really from a legitimate sender. These emails have what are called 'False Positives' - words, phrases, designs that make them look like Spam. Believe it or not 'Click here' is a Spam phrase.
Campaign Master's Spam Analysis feature allows you to test your campaign against an industry standard Spam filter (Spam Assassin) before you send your campaign.
The analysis tells you each individual aspect of the email that will score points (be marked as Spam-like) and then provides an overall rating as to whether or not the campaign is likely to get through Spam filters.