Hi, > this likely to be an issue at the receiving end, or a networking issue > between the two hosts, or is it a simple misconfiguration at my end?
could be - the notorious MTU issue, caused by dumb ICMP filtering (on your side or the remote, but then they'd have this problem with most sites). Try to reduce your MTU and see if it helps (e.g. on Linux "ifconfig eth0 mtu 1400" or "ip link set eth0 mtu 1400") - broken firewall that cannot handle tcp window scaling, see http://kerneltrap.org/node/6723, if you're using Linux. Try setting /proc/sys/net/ipv4/tcp_window_scaling to 0 - some other network related problem. Try to capture the sesssion with tcpdump and analyze the dump with wireshark. -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
