E-mail marketing, one of the most effective tools in any e-marketer's toolbox, is being suffocated by a growing deluge of spam.
The problem is so extensive, in fact, that many ISPs are being proactive about halting the spread of this scourge. Many have implemented filtering software that "scans" e-mail for certain "triggers," which may include certain phrases, formatting, and aggressive writing styles.
Unfortunately, some of this software can be (generously) described as being overly sensitive. And just like the hapless dolphin that gets caught by the tuna fisherman by mistake, so too are legitimate Web marketers being "red-flagged" by this software.