Well that did not work out..

I am not sure how many days my cart has been down. Traffic stats look like it must have been a couple days. When I went to my cart today, all I get is entirely white page with one short sentence...

"Email Error: Could not execute: /usr/sbin/sendmail"

Need less to say, I changed my email settings back to php and my site re-appeared.

Another batch of auction items ended during this time I had the Send Mail on. No notifications were received by winning bidders, and I did not receive any notifications about closing activity either.