Ive referred to the documentation on system requirements and its mentioned that a minimum of 2gb ram is required for production environments. My understanding is that Zimbra MTA service eats up a chunk of the memory. I have a production linux email system that I am looking to use to relay the MTA. The purpose of this exercise is to use zimbra as the graphical front-end. I am looking to deploy a low end VPS to deploy Zimbra and as ram is the most expensive component in hosting, im trying to get a better understanding if my setup would suffice with 512mb or 1gb of ram.