I have a ZImbra server v. ZCS 5.0 in HP Proliant 350 G3 with 1 GB memory, this server was updated from 4.5.7 two months ago. My OS is Centos 5.0 and I have 490 users. In this moment I have setting other server HP Proliant 350 G4 and 3 Gb ram; this server have more capacity in HD and processor.
In the last week I backup and restored my old server in this new server according to wiki Open Source Edition Backup Procedure - Zimbra :: Wiki
but mta in postfix cant send any email. Obviously, my short experience in this case is not good. and returned to my old server for this week. Today I want to migrate but I need your suggest and the best recommendation.