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7

As a best practice, you should be running AD DS and AD-Integrated DNS zones (ADI zones) on the same server. This is because the DNS records in ADI zones are replicated using AD DS replication and are stored in the directory, rather than using things like a zone transfer to get records across multiple DNS servers. If you want to use ADI zones for your ...


3

The first answer from jornane is correct so far as it goes, however I do not believe it addresses what the OP is really trying to get at - which is how best to handle migration of email and accounts, rather than how to handle DNS. Ordinarily there are many ways to handle this task, but because we are dealing with only one server which will be going through ...


2

There are other good answers to this, but they're fairly theoretical. I thought it might be useful for you to know that I've done this, on a number of occasions, and it's fine, but on CentOS servers using dovecot and sendmail, and I use mbox as a storage format. I know you're using postfix and Maildir, and I'm sorry I can't shed specific light on that; I ...


2

TL;DR E-mail servers will keep messages in their queue a few days if they can't be delivered. Normally during a migration, you'd have to change DNS records, but since you're staying with the same server (same IP) there's no need for that. You can simply shutdown the server, install the new one, and you're good to go. The only important thing is that you ...


1

This is why you should standardise servers rather than craft them. If the process was well documented and you know what files need copying then it shouldn't take ages to set up again. Even if you restore a backup to the new server you are still going to need to track down everywhere IP addresses are specified. That won't be just eth0 it'll be where any of ...


1

A lot depends on your actual usage, application stack and architecture, which makes answering your question almost as much a matter of opinion as technical fact. Geographical distance matters in latency, so moving your server closer to your principal users makes some sense, although in many use-cases employing a CDN might effectively achieve the same ...



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