AlexJ said:You can switch DNS settings(change IP) when you start moving data because it also take a time (usually 2-6 hours, so it's also downtime).
You can do moving stuff by IP only, but mail server will need correct pointers from DNS when it start working. By the way, usually you can't control reverse IP by yourself, so don't forget to call XEN hosting and ask them to assign correct reverse IP in DNS since most email servers rejecting connections from IPs that has incorrect or absent reverse IP.
That is exactly what I thought...if nobody else in my company can do something it becomes my job
Kinda... most DNS propagate change pretty quickly around the globe but some synchronized once in 6 hours, so it depend what DNS server you query.So the change over there should happen long before the final sync finishes
dig @far.dns.server your.server.com any
AlexJ said:Kinda... most DNS propagate change pretty quickly around the globe but some synchronized once in 6 hours, so it depend what DNS server you query.
To be make sure that your users can reach your server, you need to query outlying their provider DNS servers
Code:dig @far.dns.server your.server.com any
AlexJ said:Kinda... most DNS propagate change pretty quickly around the globe but some synchronized once in 6 hours, so it depend what DNS server you query.
but some VPS/KVM/XEN providers changing DNS settings manually(even if they have web control panel), so I meant human's delay factor, not a DNS TTL. I'm sorry, for confusion.I am the DNS and XEN host so I don't have to deal with any third parties.