Hi,I am having some 50 user in my organization from last week onwards some times we are getting an error report for sent mail Like that (550 5.7.1 nBSBiWJ3021771 This message does not comply with required standards. (550) ), so i simply restart my WIn-2003 & exchange Server & pop3 server & also ADSL router then only its working fine, daily I am facing this problem for minimum 1 Time/day. please advice me what to do.

Version SP level of Exchange? Please post the header information of completed delivery, NDR of failed delivery and sample of SMTP addresses as well. Thanks. Vishal Ramnani MCITP - Exchange 2007, MCSE Messaging, MCTS - Win 2008 Config

also run below tool to make sure connectors are fine http://www.msexchange.org/tutorials/Exchange-2003-Performance-Troubleshooting-Analyzer-Tool-v10-ExPTA.htmlVinod |CCNA|MCSE 2003 +Messaging|MCTS|ITIL V3|

Hi, Yes, please paste the completely NDR here. It can be a remote side issue. At the same time, please let me know if the remote server is using megamailservers, I saw similar issue in our internal knowledge base. Thanks, Elvis

Any update on this issue?

Hi Elvis,We are having the same issue sending an email to a domain hosted by megemailservers. What is the issue that is listed in your internal knowledge base? Delivery has failed to these recipients or distribution lists: Rita AshmanYour message wasn't delivered because of security policies. Microsoft Exchange will not try to redeliver this message for you. Please provide the following diagnostic text to your system administrator. The following organization rejected your message: mail195c2.megamailservers.com. Sent by Microsoft Exchange Server 2007 Diagnostic information for administrators: Generating server: EDGE07-02.pcconnection.com rita@pove.netmail195c2.megamailservers.com #550 5.7.1 o0JJL7k4002338 This message does not comply with required standards. ## Original message headers: Received: from mka50.pcc.int (172.20.11.145) by EDGE07-02.pcconnection.com (172.20.11.192) with Microsoft SMTP Server id 8.2.176.0; Tue, 19 Jan 2010 14:20:56 -0500 Received: from mka79.pcc.int (unverified [172.20.11.146]) by mka50.pcc.int (Clearswift SMTPRS 5.2.9) with ESMTP id <T93535e013fac14095b8e4@mka50.pcc.int> for <rita@pove.net>; Tue, 19 Jan 2010 14:21:02 -0500 Received: from mail pickup service by mka79.pcc.int with Microsoft SMTPSVC; Tue, 19 Jan 2010 14:21:02 -0500 MIME-Version: 1.0 From: Corporate Sales <corpops@pcconnection.com> To: Rita Ashman <rita@pove.net> Date: Tue, 19 Jan 2010 14:21:02 -0500 Subject: Welcome to PC Connection Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message-ID: <MKA79DmZ5fgSdmlm1DT00003c6d@mka79.pcc.int> X-OriginalArrivalTime: 19 Jan 2010 19:21:02.0088 (UTC) FILETIME=[89B49080:01CA993C] Return-Path: corpops@pcconnection.com

Does anyone have anything further on this issue? We're getting the same error from megamailservers.com as depicted above. What "standards" are being violated here?

Test using https://www.testexchangeconnectivity.com/. Run the inbound smtp test and post the results. I can tell you that they are accepting postmaster so their systems are working. Either the recipient is invalid or they are rejecting your org.James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com