unfortunately since a few weeks comcast refuses to accept the most emails we are sending from all 26 mailservers we are using ...
even more unfortunately they do not react on any request to solve this issue or reply with a reason why they do not accept email.
reason given is http://www.comcast.net/help/faq/index.jsp?faq=SecurityMail_Policy18627 but none of the mailservers can be identified on the lists mentioned there
comcast users please provide an alternate email address or write to comcast support for help.
thanks for listening
and remember: only a CRAY can run an endless loop in just three seconds.