1. A method for use in managing delivery of content over a network, comprising: receiving a message, wherein the message includes an image file; extracting the image file from the message; converting the image file to a grayscale image; performing pixel edge detection within the grayscale image; determining a pixel density distribution (PDD) for the edge detected image; if the PDD statistically indicates that the image file is an image spam file, performing an action to inhibit at least the image file from being forwarded to a destination associated with the message; and if the PDD statistically indicates that the image file is not image spam, forwarding the message with the image file towards a destination such that the image file is viewable by a recipient at a display.