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Problem sending emails: 550 Requested action not taken: NUL characters are not allowed.

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Problem sending emails: 550 Requested action not taken... - 27.Mar.2006 6:50:49 PM

rs7879

Posts: 2
Joined: 28.Jan.2005
From: New York
Status: offline

Hi:

My company recently installed a new Exchange 5.5 SP4 server on a windows 2000 server with SP4.
It could send emails to most, if not all, major free email providers.
However, when it tries to send emails into domain that uses Symantec Mail Security 4.0 with Premium Anti-spam,
our emails are bounced and we got the following error:
550 Requested action not taken: NUL characters are not allowed.

After looking into the internet header from my company email to gmail.com, I have noticed that there are some special characters on the Received-SPF line, and I suspect this is the reason that emails could not be sent. Does anyone have solution/comment? Any help would be greatly appreciated. The email header is attached below.

=========================================================
X-Gmail-Received: ca77d691bd3420002699c69f783038625df13c10
Delivered-To: raysung78@gmail.com
Received: by 10.49.90.8 with SMTP id s8cs19658nfl;
       Tue, 21 Mar 2006 19:10:54 -0800 (PST)
Received: by 10.36.247.26 with SMTP id u26mr544476nzh;
       Tue, 21 Mar 2006 19:10:53 -0800 (PST)
Return-Path: <rsung@7thonline.cn>
Received: from ntcnexchange01.7thonline.cn (ntcnexchange01.7thonline.cn [219.140.251.150])
       by mx.gmail.com with ESMTP id 38si7149nza.2006.03.21.19.10.51;
       Tue, 21 Mar 2006 19:10:53 -0800 (PST)
Received-SPF: pass (gmail.com: best guess record for domain of rsung@7thonline.cn designates 219.140.251.150 as permitted sender)
�ImCr(p�� M�<rsung@7thonline.cn>RE: test email<6548B0C5F1CF654BA62CEA832DDA6956B5F5@ntcnexchange01.7thonline.cn>c=US;a= ;p=7thonline;l=NTCNEXCHANGE01-060322030717Z-25/O=7THONLINE/OU=7THONLINE/CN=RECIPIENTS/CN=RSUNGFF654<RSung@7thonline.com>cn>FF654<raysung78@gmail.com>cn>EwLsReceived: by ntcnexchange01.7thonline.cn with Internet Mail Service (5.5.2650.21)
id <HLQMCPQ3>; Wed, 22 Mar 2006 11:07:20 +0800
=========================================================

Thanks,
Raymond