It will be transparent for them since they ask your DNS where to find the
MX ip address for the Imail machine, so as long as you modify your DNS
correctly, it will go ok.
So that your old DNS records with the old ip address don't get cached too
long, it is recommended that you reduce the TTL of the affected domains at
least TTL-length-of-time before you do the change, let the old TTL time out
and die, do the change, and then increase the TTL of the domains to the
suggested value.
Len
==============
>I am planning to change the IP-adress of my mail server on which
>Imail-server 5.05 is installed. My question is that what the consequences
>are for Imail-server, especially for the users who are defined on my
>mailserver.
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