The details regarding how To accomplish this configuration are determined by your on-premises email server. For Exchange Server, see the subsequent posts: To make use of a tailor made image to produce the VM: compute.visuals.useReadOnly about the impression To work with a snapshot to create the VM: compute.snapshots.useReadOnly to https://sparxsocial.com/story7027386/how-much-you-need-to-expect-you-ll-pay-for-a-good-linux-postfix-mail-server-setup