Re: Mx lookup

On 14 May 2008, at 15:34, Charles Marcus wrote:

>>> Just log into your OpenDNS account and disable 'Typo Corrections'  
>>> and
>>> you're good to go...
>
>> Thanks, I certainly didn't realize that option existed, but
>> how does that deal with malicious conflicting IP entries?
>>
>> i.e.
>> user A declares they do queries from IP A and turn off typo  
>> correction
>> user B declares they do queries from IP A *as well* and turn *on*  
>> typo
>> correction.
>
> ? What do users have to do with it? This is on a server. If you have
> your mail server DNS pointed at OpenDNS, it simply uses OpenDNS. You
> need to have an account with them (free), which is associated with  
> your
> IP address(es) in the 'Networks' section.

I don't think it's uncommon to have a postfix system sitting behind
a NAT IP address with a public IP address shared by web clients
in the same office. First person to sign up with that *shared* public IP
address controls the settings as far as I can tell and that might not be
the system administrator.

- Mark