Date: Wed, 8 Dec 1999 14:30:21 -0000 From: Steven Fletcher <stevenf@shellnet.co.uk> To: "'John Hay'" <jhay@mikom.csir.co.za> Cc: <net@freebsd.org> Subject: RE: Very odd problem with email. Message-ID: <277A0E0FE38ED311A66A00A0C9D43A3D0781F9@data.shellnet.co.uk> In-Reply-To: <277A0E0FE38ED311A66A00A0C9D43A3D0524C8@data.shellnet.co.uk>
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Hiya Thanks for the reply. You are somewhat correct.... just 20 minutes ago we recived a phonecall from UUnet who told us what was going on. It was in fact, one of the oddest problems that they've ever seen, caused by many ~'s in the that is being transferred (belive it or not, I've verified this and to my amazements it's true!) - it's just not getting through at the Linx. Thanks for the reply anyhow. Steven Fletcher stevenf@shellnet.co.uk > -----Original Message----- > From: John Hay [mailto:jhay@mikom.csir.co.za] > Sent: 08 December 1999 14:04 > To: Steven Fletcher > Cc: freebsd-net@FreeBSD.ORG > Subject: Re: Very odd problem with email. > > > > > > I have now tried what I consider to be 'everything' - swapping the > > mailserver hardware, swapping the POP3 server that we use > (tried QPOP & > > Cucipop - QPOP emails are getting slightly further than > those delivered via > > Cucipop). Running tcpdump on both the affected machines > (the mailserver & > > the external machine) shows that ACK's don't seem to be > getting through: > > > > 16:42:31.530365 194.129.209.11.pop3 > www5.shellnet.co.uk.4969: P > > 1590:2928(1338) ack 35 win 17520 (DF) > > > > Is repeated at increasing intervals after the file stops. > > One possibility is that the path mtu discovery is getting screwed up > somewhere. That may happen if some link have a smaller mtu that your > local net and icmp NEEDFRAG packets are blocked. > > John > -- > John Hay -- John.Hay@mikom.csir.co.za > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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