MessageExchange 2000 SP2 on 2000 server sp2 I have one client who never receives email from us. We can get email from them. When I examine the log file, I see this 2002-08-23 00:06:41 - OutboundConnectionResponse SMTPSVC1 FLEETONE_MAIL - 25 - - 220+jack+ESMTP 0 0 14 0 31 SMTP - - - - 2002-08-23 00:06:41 jack OutboundConnectionCommand SMTPSVC1 FLEETONE_MAIL - 25 EHLO - mail1.transplatinum.com 0 0 4 0 31 SMTP - - - - 2002-08-23 00:06:41 jack OutboundConnectionResponse SMTPSVC1 FLEETONE_MAIL - 25 - - 502+++ 0 0 6 0 31 SMTP - - - - 2002-08-23 00:06:41 jack OutboundConnectionCommand SMTPSVC1 FLEETONE_MAIL - 25 HELO - mail1.transplatinum.com 0 0 4 0 31 SMTP - - - - 2002-08-23 00:06:41 jack OutboundConnectionResponse SMTPSVC1 FLEETONE_MAIL - 25 - - 250+jack 0 0 8 0 47 SMTP - - - - 2002-08-23 00:06:41 jack OutboundConnectionCommand SMTPSVC1 FLEETONE_MAIL - 25 MAIL - FROM:<autoprocess@xxxxxxxxxxxx> 0 0 4 0 63 SMTP - - - - 2002-08-23 00:06:41 jack OutboundConnectionResponse SMTPSVC1 FLEETONE_MAIL - 25 - - 250+ok 0 0 6 0 63 SMTP - - - - 2002-08-23 00:06:41 jack OutboundConnectionCommand SMTPSVC1 FLEETONE_MAIL - 25 RCPT - TO:<dfulmer@xxxxxxxxxxxxxxxxxx> 0 0 4 0 63 SMTP - - - - 2002-08-23 00:06:41 jack OutboundConnectionResponse SMTPSVC1 FLEETONE_MAIL - 25 - - 250+ok 0 0 6 0 78 SMTP - - - - 2002-08-23 00:06:41 jack OutboundConnectionCommand SMTPSVC1 FLEETONE_MAIL - 25 DATA - - 0 0 4 0 78 SMTP - - - - 2002-08-23 00:06:41 jack OutboundConnectionResponse SMTPSVC1 FLEETONE_MAIL - 25 - - 354+go+ahead 0 0 12 0 94 SMTP - - - - They are the only client we seem to have an issue with. I talked to the admin for the client and they say it is a problem on our side. The only reference I have been able to find about a jack server was a linux audio server. Any insight is greatly appreciated. Rob Freeman Fleetone