Siebel Outbound Email Address Validation - Invalid "To" Addresses with Error: SMTP DATA error: 503 5.0.0 Need RCPT (recipient) and SBL-CMO-00152
Last updated on JULY 12, 2017
Applies to:Siebel Email Response - Version 7.7.2  and later
Siebel eCommunications eMail Response - Version 7.7.2 SIA  and later
z*OBSOLETE: Microsoft Windows Server 2003
Product Release: V7 (Enterprise)
Version: 7.7.2 
Database: Microsoft SQL Server 2000 SP3
Application Server OS: Microsoft Windows 2003 Server
Database Server OS: Microsoft Windows 2003 Server
This document was previously published as Siebel SR 38-2505450751.
Users asked if Siebel does any validation on the "To" address of an outbound email.
On a test with a correct domain name, i.e. @testdomain.com, but wrong mailbox or localpart name: "lxxxx". The from address on these emails was a test email address: email@example.com.
The activity record status for this outbound email in Siebel was changed to "Done" after sending. But there were the following errors in the Comm Outbound Manager tasks screen:
"SMTP DATA error: 503 5.0.0 Need RCPT (recipient).
(commdlv.cpp (578)) SBL-CMO-00152: Send to firstname.lastname@example.org, subject testing with testdomain.com email address had error ."
How did Siebel generate this error message? Did Siebel get some message from the SMTP server? I did not get any bounce back for this error email.
The same email was sent out from regular MS Outlook client , and got the following bounce back message:
"From: System Administrator
Sent: Monday, September 19, 2005 2:26 PM
Subject: Undeliverable:Testing from outlook
Subject: Testing from outlook
Sent: 9/19/2005 2:25 PM
The following recipient(s) could not be reached:
The e-mail account does not exist at the organization this message was sent to. Check the e-mail address, or contact the recipient directly to find out the correct address.
<MESSAGE-AH.ad.testdomain.com #5.1.1 smtp;550 5.1.1 <email@example.com>... User unknown>"
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