http://www.cox.com/ aka
www.rr.com in my area,
blocks emails with known big companies URL's in them.
If you call them and ask, they swear they do NOT block anything, it must be
the end users spam filter, once I told them I have done several tests, they then did say they are trying to "Clean' the internet.
I can NOT send an email that contains the URL's of some Adult Companies,
Here is just a few
www.cumfiesta.com
www.tawneestone.com
www.teenkelly.com
www.jordancapri.com
Think about people, using this ISP and wanting to write to customer service,
For passwords, and or to cancel...
I was told I could Email, and asked to be removed, but it would be a waste of time...
I am not saying there are Not ways around this, like form mail on the site, but
think about it, there is several cancel buttons, but people still email us to do it...