What tildedave said. I was on the wrong end of blacklisting situation and it was extremely frustrating. First, you don't know that your customers aren't receiv

What tildedave said. I was on the wrong end of blacklisting situation and it was extremely frustrating. First, you don't know that your customers aren't receiving the emails. Second, you have very little clout in getting things cleared up. Third, it's just a huge PITA that wastes a lot of time. I'm running a very small operation, but one bad instance of my IP being blacklisted prompted me to shell out the extra $3 /months to have Rackspace send my emails.