[LinuxBender]

I've had what you describe happen recently with some wireless vendors. They flat out won't even acknowledge my own domains a valid email domains despite being so and following every possible best practice. No VPN and using a static IP no less. I ended up using a reseller that apparently has not gotten big enough to use the over-zealous tools just yet.

One of my theories is that the older internet businesses probably lost most of their original developers, downsized their staff too much and had to shim something simplistic into their customer on-boarding flows and then found a turn-key solution that had a maximum protection setting that does not give insightful or accurate statistics. They are probably not even aware of all the lost financial opportunities.