Re: Decentralized reliable instant messaging?
On Tue 30 Aug 2016 at 18:45:34 (+0100), Brian wrote:
> On Tue 30 Aug 2016 at 11:18:10 -0500, David Wright wrote:
>
> > On Tue 30 Aug 2016 at 09:59:42 (-0400), Henning Follmann wrote:
> > >
> > > However, why email is still reliable, because a proper setup provides you
> > > with a well defined error messages (in case it is not delivered).
> >
> > There are occasions when this is several days later, unfortunately.
> > Some of the retry intervals seem to have been set in the days when
> > people/institutions dialled up the internet on a daily schedule.
>
> I think you have moved from unreliability (whatever that means) to
> timeliness of delivery. If you put your mail under the control of
> a third party you presumably accept their conditions. Anyway, what,
> without drowning the internet in frequent retries, would be suitable
> as a sequence of retry intervals? Exim on Debian uses
>
> # This single retry rule applies to all domains and all errors. It specifies
> # retries every 15 minutes for 2 hours, then increasing retry intervals,
> # starting at 1 hour and increasing each time by a factor of 1.5, up to 16
> # hours, then retries every 6 hours until 4 days have passed since the first
> # failed delivery.
Much of that is reasonable, but I think (without any evidence) that
most people would prefer to receive a message of abandonment after
16 hours (perhaps only six) rather that sit on their hands for
four days.
For comparison, look at the time people here wait for a posting to
appear before submitting a second try, and a third...
Cheers,
David.
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