Hi, Ansgar.

Actually, message-id's frequently have internal meaning, depending on
where they are issued. If Apple just wanted a random 128-bit number,
they wouldn't put the dashes in it. There is internal structure --- a
32-bit number, three 16-bit numbers, and a 48-bit number. We just
don't know what those numbers mean.

On Mar 27, 2007, at 12:01 PM, Ansgar -59cobalt- Wiechers wrote:

> On 2007-03-27 Simson Garfinkel wrote:
>> On Mar 19, 2007, at 1:52 PM, Ansgar -59cobalt- Wiechers wrote:
>>> On 2007-03-16 gdardick (at) dardick (dot) net [email concealed] wrote:
>>>> I am trying to find the format of mac.com message-ids. The
>>>> following
>>>> are examples of message-id's received in emails from mac.com.
>>>>
>>>> F39DF6D4-4C64-4C78-91E1-EB9EF83F492A (at) MAC (dot) COM [email concealed]
>>>> 11DF7440-1BAC-4E05-9A6D-5F13C3DA7A53 (at) MAC (dot) COM [email concealed]
>>>>
>>>> Any ideas?
>>>
>>> I'm not sure if I understand your question correctly. Are you
>>> looking
>>> for a regular expression to match those message-IDs?
>>>
>>> [0-9A-F]{8}-([0-9A-F]{4}-){3}[0-9A-F]{12}@MAC\.COM
>>
>> No. He's looking for a meaning of what they mean.
>
> Well, they're message-IDs, they don't mean anything by themselves.
> They're just supposed to be unique identifiers for a given message
> (e-mail, in particular).
>
> Regards
> Ansgar Wiechers
> --
> "All vulnerabilities deserve a public fear period prior to patches
> becoming available."
> --Jason Coombs on Bugtraq
>

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