When some of our users send email to multiple recipients that belong to the same outside client domain only on person gets the email where the rest don't and our exchange server produces the following event. When email is resent to individuals - one recipient with no CC or BCC per email- it goes through. Server: Exchange 2003 sp2 on windows 2003 Event Type: Error Event Source: MSExchangeTransport Event Category: SMTP Protocol Event ID: 7004 Date: 5/11/2008 Time: 11:51:50 AM User: N/A Computer: OurEmailServer Description: This is an SMTP protocol error log for virtual server ID 1, connection #13664. The remote host "199.107.71.119", responded to the SMTP command "rcpt" with "550 5.7.1 Unable to relay for jdoe@outSideClienDomain.net . The full command sent was "RCPT TO: jdoe@outSideClienDomain.net . This will probably cause the connection to fail. This is an SMTP protocol error log for virtual server ID 1, connection The remote host , responded to the SMTP command rcpt with "550 5.7.1 Unable to relay for . The full command sent was This will probably cause the connection to fail.
