Selcuk Yazar: > postfix/smtpd[6055]: lost connection after DATA (3865 bytes) from > mx2.iparadigms.com[199.47.85.44]
Possible cause: - Broken WSCALE (window scaling). https://en.wikipedia.org/wiki/TCP_window_scale_option Less likely, because the failure happened after 3865 bytes: - Broken MTU (maximum transmission unit). https://en.wikipedia.org/wiki/Maximum_transmission_unit Or something else :-) Only a network sniffer recording can tell. Wietse
