I ran my own server for bsdimp.com and village.org form the early 90s until 2009 or so. I switched to gmail when I was seriously looking at dropping $10k for a server that had enough horse power to filter the 50k-75k spam I was getting a month at that time. Switching to google was easier and I didn't have to spend the $10k nor the 4 hours a week on the care and feeding of the black lists, etc.

Warner