As of now we have outsourced mail services we have around 400 users. Service provider has placed the linux box in my LAN for fetching the messages, now I have been asked to setup the linux mail server using zimbra for this we have upgraded our leased line bandwidth to 6 mbps and also another ISP for the backup also procured Vmware vsphere product and subscription and EMC storage, we have two servers with good configuration , over all the plan is to achieve the HA cluster.
But still iam little bit afraid thinking is it a good or recommended practice to purchase the linux box on cloud which has antispam protection and deploy the mail server so that mail server will be running on the cloud with good service provider which has antispam for the mail services and need not worry if ISP fails mail bouncing problems.
1. Is it recommended to implement the mail server in the LAN by using the above mentioned infrastructure
2. Please suggest me purchasing the linux server from the cloud is recommended if yes please suggest the best service provider will purchase the linux server on the cloud with them. Iam looking for unlimited bandwidth usage as we have 400 users and the antispam control support, please suggest good such cloud service provider.
Please help thanks in advance.