Re: [Exim] How unique are exim queue msg IDs?

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Author: The Flying Hamster
Date:  
To: Jeffrey Goldberg
CC: exim-users
Subject: Re: [Exim] How unique are exim queue msg IDs?
On Saturday 04 November 2000 04:10, Jeffrey Goldberg wrote:
> On Fri, 3 Nov 2000, The Flying Hamster wrote:
> > abusing other peopleOne thought is to
> >
> > [...] use the exim msg ID as a unique key, which naturally brings up
> > the question "is it unique"
>
> The ID that exim adds will be unique if
>     (a) You never set your machines clock back in time
>     (b) You do not have two instances of exim running on the same host.
>     (c) You aren't running on exim on multiple hosts which think that
>         they have the same name.


I think this counts as "unique enough" for my needs, particularly if I
combine the queue ID with the hostname of the server in question.

> Now that I think about it, I actually don't know how exim actually
> enforces unique IDs. Since multiple users could call /path/to/exim -t at
> the same time, and I don't know how these processes would know about each
> other. So I am not fully confident about what I've said.