Post by thread:Duplicates, anyone? [OT]

Hi, > >Are any of the rest of you getting a hi number of dupes from this > >list? Not all of them, just enough to wonder about. > > 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. It is concervative so when in doubt, send it again. You can check which two servers had the problem by looking at the mail headers carefully. Sometimes though it is the user that sends the mail twice due to a broken mail connection where it does not get cleared from the mail client OUTTRAY. Cheers -- Kalle Pihlajasaari spam_OUTkalleTakeThisOuTip.co.za http://www.ip.co.za/ip Interface Products P O Box 15775, DOORNFONTEIN, 2028, South Africa + 27 (11) 402-7750 Fax: 402-7751 http://www.ip.co.za/people/kalle DonTronics, Silicon Studio and Wirz Electronics uP Product Dealer

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 .....vanesKILLspam@spam@ilink.nis.za | http://www.nis.za/~vanes LOOKING FOR TEMPORARY / HOLIDAY ACCOMODATION? http://www.nis.za/~vanes/accom.htm