The bounce message said:
~~~~~
Delivery to the following recipient has been delayed:
kstars at 30doradus.org
~~~~~
I think this was the key problem but I'm not certain:
Authentication-Results: mx.google.com; spf=neutral (google.com:
209.86.89.67 is neither permitted nor denied by domain of
bowlin at mindspring.com)
--
Peace, James