Re: DNS MX record question
- From: "Tom Felts" <tfelts@xxxxxxxxxxxxxxxxxxxxxx>
- Date: Mon, 23 Jan 2006 13:38:12 -0500
I won't disagree, but I night suggest that your timeline could be a little
aggressive. Some DNS servers cache records for varying lengths of time.
Depending upon what your Time-out settings are, your timeline may be
aggressive. When we phase MX records, we shorten the Time to Live on our
zone to 6 hours, a week before the change. We then add the MX, and let it
bake another week before removing the original. Then we re-adjust the TTL
back to a higher range.
Your mileage may vary....
"Mike Mullins" <MikeMullins@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:4B4C906B-B521-4017-A15E-75D005EC57F0@xxxxxxxxxxxxxxxx
>I have one mail server on a LAN. I have two gateways, one on existing ISP
> with MX record and other gateway on new ISP with no MX record.
>
> I want to migrate to the new ISP and phase out the old one.
>
> With my 10 years experience I would create a new MX as follows.....
>
> MX 10 mx-old.domain.com.
> MX 10 mx-new.domain.com.
>
> Then 24 hours later I would after ensuring that my new gateway was
> correctly
> configured with static NAT on port 25, would simply change the Exchange
> servers default gateway.
>
> Then after three days I would remove the old MX record and 2 days after
> that remove the old gateway.
>
> NO MAIL WOULD BE LOST.
>
> Who would like to disagree.
.
- Prev by Date: Re: Help!!!
- Next by Date: Help with 5.7.1 and forwarding to smtp...
- Previous by thread: Help!!!
- Next by thread: Help with 5.7.1 and forwarding to smtp...
- Index(es):
Relevant Pages
|
