I may have answered my own question. Seems this customer's domain has expired, that would make is sending address invalid.
Thanks Anyway. Mike -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Mike Callahan Sent: Tuesday, March 16, 2004 2:25 PM To: [EMAIL PROTECTED] Subject: [IMail Forum] Unknown user issue I have a customer that is sending to a user at the Comcast domain. When I - or the customer - send to this user from the customer's account, we get a bounce saying unknown user. However, the Comcast user says he's getting mail from other folks just fine. Also, when I send to him using a different mail server the message seems to go through. Below is the log excerpt from one transaction. Notice Comcast responds with a "550 [PERMFAIL] comcast.net requires valid sender" even though the sender and the recipient addresses are both valid. Any ideas? I know 550 is generally a relay issue but I don't see what is invalid about this. Of course Comcast is telling the user that the mail is never even reaching their server. Go figure. LOG ENTRY: 20040314 110650 127.0.0.1 SMTP (0CF07C24) processing D:\IMail\spool\Q831a218d00ea02a3.SMD 20040314 110650 127.0.0.1 SMTP (0CF07C24) Info - DNS Cache full, deleting last item (covad.net) 20040314 110650 127.0.0.1 SMTP (0CF07C24) Info - Adding comcast.net to DNS cache - TTL = 900 20040314 110650 127.0.0.1 SMTP (0CF07C24) Trying comcast.net (0) 20040314 110650 127.0.0.1 SMTP (0CF07C24) [x] Connecting socket to service <SMTP> on host <comcast.net> using protocol <tcp> 20040314 110650 127.0.0.1 SMTP (0CF07C24) [x] using source IP for ms.bullseyetelecom.net [207.148.192.51] 20040314 110650 127.0.0.1 SMTP (0CF07C24) Info - Found comcast.net in DNS Cache 20040314 110650 127.0.0.1 SMTP (0CF07C24) 220 rwcrmxc16.comcast.net - Maillennium ESMTP/MULTIBOX rwcrmxc16 #596 20040314 110650 127.0.0.1 SMTP (0CF07C24) >EHLO ms.bullseyetelecom.net 20040314 110650 127.0.0.1 SMTP (0CF07C24) 250-rwcrmxc16.comcast.net 20040314 110650 127.0.0.1 SMTP (0CF07C24) 250-7BIT 20040314 110650 127.0.0.1 SMTP (0CF07C24) 250-8BITMIME 20040314 110650 127.0.0.1 SMTP (0CF07C24) 250-DSN 20040314 110650 127.0.0.1 SMTP (0CF07C24) 250-EXPN 20040314 110650 127.0.0.1 SMTP (0CF07C24) 250-HELP 20040314 110650 127.0.0.1 SMTP (0CF07C24) 250-NOOP 20040314 110650 127.0.0.1 SMTP (0CF07C24) 250-PIPELINING 20040314 110650 127.0.0.1 SMTP (0CF07C24) 250-SIZE 10485760 20040314 110650 127.0.0.1 SMTP (0CF07C24) 250-VERS V04.62c++ 20040314 110650 127.0.0.1 SMTP (0CF07C24) 250 XMVP 2 20040314 110650 127.0.0.1 SMTP (0CF07C24) >MAIL FROM:<[EMAIL PROTECTED]> 20040314 110650 127.0.0.1 SMTP (0CF07C24) 250 ok 20040314 110650 127.0.0.1 SMTP (0CF07C24) >RCPT To:<[EMAIL PROTECTED]> 20040314 110650 127.0.0.1 SMTP (0CF07C24) 550 [PERMFAIL] comcast.net requires valid sender 20040314 110650 127.0.0.1 SMTP (0CF07C24) >QUIT 20040314 110650 127.0.0.1 SMTP (0CF07C24) 221 rwcrmxc16.comcast.net 20040314 110650 127.0.0.1 SMTP (0CF07C24) [u] closing socket (u) 20040314 110650 127.0.0.1 SMTP (0CF07C24) Creating message from Postmaster 20040314 110651 127.0.0.1 SMTP (0CF07C24) finished D:\IMail\spool\Q831a218d00ea02a3.SMD status=2 BOUNCE MESSAGE: Unknown user: [EMAIL PROTECTED] Original message follows. Received: from FrontPC2 [207.148.196.235] by ms.bullseyetelecom.net (SMTPD32-8.05) id A31A218D00EA; Sun, 14 Mar 2004 11:06:50 -0500 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii From: "ShowingDesk" <[EMAIL PROTECTED]> To: "Fred Glaysher" <[EMAIL PROTECTED]> Subject: Showing - 1392 Otter Drive Message-ID: <[EMAIL PROTECTED]> Date: Sun, 14 Mar 2004 11:07:33 -0500 X-Mailer: ShowingDesk Reply-To: [EMAIL PROTECTED] <Message DATA Deleted> Thanks, Mike Callahan To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
