Kalle Pihlajasaari wrote:

> >     Ya, I've been noticing it as well, some messages are just there
> twice.
>
> These can usually be attributed to a mail sessage being interrupted
> by a network failure at the crucial moment at completion.  The sending
>
> server sends the last packet of data and it gets to the receiver that
> accepts the mail and sends back the final ACK.  The mail gets sent
> on its way but if the ACK does not get to the sending server it will
> retry to send the message again in a bit.  There are some other
> checks to avoid this but with lots of messages and busy networks
> the special cases that can avoid the checks do occur.

Do networks fail THAT often & regularly? Wow....

--
Eric van Es               | Cape Town, South Africa
mailto:vanes@ilink.nis.za | http://www.nis.za/~vanes
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