Okay - I can't believe Verant got to Onelist *chuckles* but apparently, 
they added a new undocumented feature called Family Filter, which basically 
blocks any emails that contain "inappropriate language" (shades of 
aol!!).  Onelist didn't bother to tell anyone about this, they just added 
it  and turned it on for every subscriber.
To turn it off, you need to go to the Home tab once you have signed in to 
http://www.onelist.com/. If you look where you would normally search for a 
list, above the box is a little "Family Filter On" title... Click it and 
that takes you to a page with a check box.  Unmark it and click "Done".
Talies the Wanderer