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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Problems receiving emails from china...
Hi, Is there similar problem existing with sending email to email server inside china? maybe you could check end-to-end delay and packet loss rate. Another method, ask your customer to cut the attachment to several parts and send them seperately. Joe --- Lou Laczo <[email protected]> wrote: > > Hi all, > > I did a quick search of the archives and was unable > to find any previous > discussions relevant to this topic. > > One of our clients has been having problems > receiving some legitmate > emails from business associates in China. The > client's mailserver is > running qmail. In almost all of the cases, the > failing email has at least > one attachment and is larger than what might be > considered "normal". Our > client's mailserver receives part of the message and > then the smtp > connection hangs and eventyally times out. Many > times, the sending mail > server will attempt to send the message again and > again before finally > giving up. The failing messages can be successfully > delivered to hotmail > and/or yahoo accounts. > > I've observed this problem while it was occuring and > there are multiple > smtp connections open between the clients server and > the sender's server. > The connections are in various states, some > established, some in fin_wait, > etc. I've tried tracerouting to the sender's server > and in every case I've > observed the trace times are terrible. I've looked > at various aspects of > the mail server's configuration and all looks well > there. I've even tried > having the senders email to a totally different > mailserver on our network > and get similar failures. It's staring to look like > this is just a simple > case of bad network connectivity from the sender. My > guess is that the big > free email systems have relay servers all over the > world, so the sender in > China would be talking to a server much closer to > home. This would explain > why the mail can be successfully delivered to > hotmail, yahoo, etc. > > Has anyone ever experienced a problem similar to > this? Thanks in advance > for your attention and any responses/help. > > --Lou. > > ----------------------------------------------------------------- > Technical Support - INetU Managed Hosting - > http://www.INetU.net > [email protected] - Phone: (610) 266-7441 > > > __________________________________________________ Do You Yahoo!? Log on to Messenger with your mobile phone! http://sg.messenger.yahoo.com
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