Question Regarding SPF and Mailing Lists

[Mark Phillips]

My hosting provider has asked me if I want SPF records setup for my domains. I 
looked at these articles:
http://www.linuxjournal.com/article/7327, which took me to 
http://www.openspf.org/Project_Overview, which took me to 
http://homepages.tesco.net./~J.deBoynePollard/FGA/smtp-spf-is-harmful.html

My question is how does SPF work with mailing lists? If I send an email from 
my home computer, which goes through cox's SMTP servers, to the list on the 
mailman server at my ISP, and then mailman sends the email to everyone on the 
list, will SPF work (I.e. is the FROM field set to cox's SMTP server or my 
ISP's SMTP server), or will the email be blocked because there may not be an 
SPF entry for all of cox's email servers. What about all the other members of 
the list who send email to the list - could they be blocked?

As you can tell, I do not know much about the inner working of email.

Finally, what do you think about SPF?

Thanks!
-- 
Mark