As of now we have outsourced the mail services to the web hosting company and we have a domain control panel login details where the mx pointing is done for the outsourced web hosting company , now I want configure the mail server in the office ( in the LAN) using the zimbra collaboration suite (open source), I have time of 30 days to completely setup the zimbra mail server up and working but I have few doubts
1. while installing the zimbra collaboration suite (zcs) it should have a valid MX record, if I Change the MX record to point it to the local IP of the server which is in the office then at one stretch I have completely depend on this new server but for now I only want to install zcs in the office server for the same domain which is outsourced to the webhosting company but there should not be any down time in the mail services. Later after 30 days will completely depend on this new server of the office.
2. I want complete the installation and configuration part for the same domain which is outsourced on the 30th day this new server should start working.
Please suggest me how to achieve the above also request you to give a suggestion for such implementation.
Thanks in advance.