I am in need of a resouce of backup of my mx. If my clients mail server is down I would like all my email to go to a source where I can recover it once my server comes back up.
I have my own server in my office but I do not run exchange. What companies supply this service or what open source software can I put on my server to facilitate. I know if I add a higher # mx record for my clients then the email will flow there until the lower value comes back up then it will transfer automatically all the emails.