Text vs. MIME. It's a debate that'll go on for as long as there's email marketing. But when it comes to content filters, what is it that triggers them? Is it too much content? Too little? Finding the balance between those two can be frustrating to say the least. And while testing is the only way to find out for yourself, I usually find that testing = no $! And it's tough to pull the trigger on a send when you know that the revenue generated from it is going to be marginal at best. So here's a little insight into content filters. source: Word To The Wise