Re: `user-mail-address' for message-ids

[prj@po.cwru.edu (Paul Jarc)]

"Jason R. Mastaler" <jason@mastaler.com> writes:
> Kai.Grossjohann@CS.Uni-Dortmund.DE (Kai Großjohann) writes:
> > Suppose one client does time+uid+name and another does
> > time+uid+Xname and there is foo@hotmail.com as well as
> > Xfoo@hotmail.com.  Then it's sufficient for the uid to 
> > be equal and the time, and -- clash!
> 
> Yes, but the username will not be equal (name != Xname) 
> and therefore the Message-IDs will differ.

They'll be the same: user foo uses algorithm 1, which spits out
"X"+username ("Xfoo"), along with other stuff.  User Xfoo uses
algorithm 2, which spits out username ("Xfoo"), along with other
stuff, which happens to be the same other stuff.  Both algorithms,
with their respective inputs, produce the same output.

We can ensure that the LHS would be unique if everyone used the same
algorithm, but we can't make everyone use the same algorithm.


paul