RE: No ESMTP response - ehlo test.com 500 5.3.3 Unrecognized command

From: Clifton Hughes [MS] (chughes_at_microsoft.com)
Date: 12/06/04

  • Next message: exchangerookie1994: "RE: No ESMTP response - ehlo test.com 500 5.3.3 Unrecognized comma" 
    Date: Mon, 06 Dec 2004 21:47:40 GMT

    The banner your seeing is from a PIX Firewall with the SMTP Fixup protocol
    enabled. This is blocking all but the basic SMTP verbs (commands) and will
    not allow ESMTP functionality. It is recommended that you disable the SMTP
    Fixup protocol on the PIX for any ESMTP Mail servers according to Cisco's
    website:

    For more information, visit the following Cisco Web sites:

            http://www.cisco.com/pcgi-bin/Support/browse/psp_view.pl?p=Hardware:PIX

            http://www.cisco.com/warp/public/110/22.html

    There is also reference to the above information in the following Microsoft
    Article:
    320027 Cannot send or receive e-mail messages behind a Cisco PIX firewall
      http://kb/article.asp?id=Q320027

    Regards,

    Cliff

  • Next message: exchangerookie1994: "RE: No ESMTP response - ehlo test.com 500 5.3.3 Unrecognized comma"

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