"#5.5.0 smtp;500 Non RFC-compliant response received"

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• Wednesday, November 15, 2006 10:35 PMbigfooteagle

   
  

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  I am having the same problem.  I have an Outlook 2003 (NOT express) client connecting to the exchange 2003 server.  In one case the end-user is forwarding a short message with three attachments to an Outlook Distribution list of 39 addresses.  The message is hitting the exchange server and being returned with the subject line message above.  ALL e-mail addresses in the distribution list are being returned at the same time.  In the second case a different end-user within the same domain is sending a message to about 1,000 users as a BCC.  She is getting the same response.  We are using a SonicWALL ESS500 Mail security applicance (formerly MailFrontier) to handle all inbound and outbound e-mail traffic.  The message is never getting out of the exchange server  The extensive logs on the ESS500 are not listing any of the e-mails with the above message.  This is a problem within the Microsoft family of products, but I have no idea what the resolution is.  Any ideas or assistance would be appreciated.

  Thanks,

  JAM

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• Wednesday, January 03, 2007 3:39 PMWheelerC

   
  

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  Ditto here.  I have the same exact setup you have.  It worked fine before the SonicWall installation.

  Have you been able to resolve this?

  Thanks,
  Pat

  Call me!
  860-793-4442

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• Wednesday, February 07, 2007 5:26 PMjml1079

   
  

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  Did anyone find the solution for this... Was it a MS issue or Sonicwall?
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• Monday, May 14, 2007 10:58 AMJody Spoor

   
  

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  Our Email Security is very RFC strict.

   

  This is an outlook issue.

   

  Please check following URL:

   

  http://smtp25.blogspot.com/2007/04/500-non-rfc-compliant-responses_18.html

   

  Good luck

   

  Jody Spoor

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