Re: Lost messages

On Fri, Jan 24, 2014 at 9:41 AM, Torsten Bronger
<[email protected]> wrote:
> Hallöchen!
>
> Alois Mahdal writes:
>
>> On Mon, 20 Jan 2014 08:06:02 +0100
>> Torsten Bronger <[email protected]> wrote:
>>
>> [...]
>>
>>> But messages can't get through for obvious reasons.  I thought
>>> that they are stored on the server and delivered at a later time,
>>> but this doesn't happen.
>>
>> This is possible, but AFAIK not default for most free public
>> servers.  There are more reasons for this.  First, the messages
>> need to be stored somewhere, which costs money.  Then, some people
>> would not like if their messages were stored any longer than
>> necessary.
>
> Well, they *are* stored and delivered later if the buddy is offline
> and I sent something.  This is weird: If I see him online => message
> may be lost, if I see him offline => message is delivered later.  We
> observed this on at least two servers, the commercial gmx.net and
> the free draugr.de.
>
> So there surely is a problem with XMPP, at least with these
> implementations.
>
> I will try to contact the admin of draugr.de, possibly ejabberd has
> a feature like "store unreceived messages for later delivery".

This is an issue if you're using XMPP client/server implementations
that don't support the 'ack' part of XEP-0198.

/K
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