[ngw] Changing external IP of mail

Richard Layton richcsp at gmail.com
Fri Sep 21 19:12:39 UTC 2012


Good tip!  thanks

On Fri, Sep 21, 2012 at 3:04 PM, Adam Kuhn <akuhn at niu.edu> wrote:

> Might also want to reduce the DNS TTL a few days before doing this to
> minimize the time the IP will be cached on other DNS servers.  Not that all
> servers will bother to respect the TTL...
>
> >>> "Ryan Irish" <rirish at boonecountymo.org> 9/21/2012 2:00 PM >>>
>  Make sure that the new IP address or range of IP address is not already
> on a blacklist somewhere.  That happened to use when we move to a new ISP.
>  The class C IP range they gave us was all blacklisted.  Hence we requested
> a new range of IP addresses.
>
> Other than that I have not had any problems with blacklisting when moving
> to a new public IP address.  DNS updates happen really really fast now a
> days.
>
>
> >>> Richard Layton <richcsp at gmail.com> 9/21/2012 1:55 PM >>>
> Hello All,
>
>   We are going to be changing our external IP scheme and I am concerned
> about getting blacklisted when this first happens.
> My understanding is nothing can be done until the new IP replicates out
> after we change our external DNS.  Is there another
> way to do this so mail delivery is not interrupted?
>
> Thanks!
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