I had a similar idea to this about a year back and didn't get out of the feasibility stage. After crunching the numbers I just couldn't make it work as a free

I had a similar idea to this about a year back and didn't get out of the feasibility stage. After crunching the numbers I just couldn't make it work as a free service. Maybe I wasn't doing it right, but the bandwidth of attachments becomes the killer. Mail-list.com seems to have the pricing in just about the right spot, and I'm not sure that is something the common user is going to go use. It appears that Fiesta.cc had this issue as well. From their blog they were going to shut down about a year ago but managed to figure out how to keep it running. Their site is a little short on details - I'm not sure what the limits on the mailing lists are.