Re: [Asrg] What are the IPs that sends mail for a domain?

Ian Eiloart <iane@sussex.ac.uk> Thu, 02 July 2009 12:17 UTC

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Subject: Re: [Asrg] What are the IPs that sends mail for a domain?
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--On 1 July 2009 20:37:37 +0200 Alessandro Vesely <vesely@tana.it> wrote:

> John Leslie wrote:
>>>
>>> [For accountability, I'd use] a domain name. One reason is that
>>> large ESP have many MTAs that can be used interchangeably. In
>>> addition, the person responsible for an MTA is not always identifiable
>>> (in Italy, the mandate to state who are the sysadmins of an MTA is
>>> being procrastinated every few months, since November 2008.) By
>>> contrast, domain registrants often have whois records pointing to them.
>>
>>    I think I'm catching on: you want to link the MTA to a _registered_
>> domain.
>
> Yup. However, no official registration exists for, say, us.ibm.com or
> it.ibm.com. The latter two ones happen to have different hostmaster
> addresses, therefore it would not be correct for them to share the same
> accountability token "ibm.com". I can only trust the DNS about the
> legitimacy of such subdomain delegations.

ibm.com isn't an email domain. At least, it's not one they use to send 
email. They do send email from @us.ibm.com addreses.


-- 
Ian Eiloart
IT Services, University of Sussex
01273-873148 x3148
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