Hello Everyone...Some might know by now Open Source Mail Server Zimbra but for those who does not know if you are looking for a free MAIL Server grab Zimbra it runs on Linux OS, web client for Smartphone is ready. ZImbra is FREE, Flexible and Powerful...Good luck to everyone

I know universities which use zimbra, and it works very well.

Thank you for your reply...I hope more people share useful information so everyone can benefit from it. I also use VMware ESXi open source to host my Open source Zimbra mail server...

VMWare ESXi open source? These two things do not go together.