Answering my own question again... On Sat, 29 Apr 2000, Neale Banks wrote: [...] > The main queston: should I be concerned about the "timeout after DATA" > messages? Turned out to be a path-MTU-discovery problem. See: http://msgs.securepoint.com/cgi-bin/get/postfix9908/86.html http://postfix.mirror.aarnet.edu.au//faq.html#timeouts Regards, Neale.