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mtxit

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Exchange 2010 relays from external website 550 SPAM EMAIL NOT ACCEPTED

Hi,

We have a requirement from a client to set their Exchange (2010/SBS2011) to allow their externally-hosted website to relay using authentication.

For testing purposes I've created a new Receive Connector and specified it with my IP address and Basic Authentication.  If I now use telnet to connect I can authenticate fine, however when I try to send an email I get '550 ######## SPAM EMAIL NOT ACCEPTED ########'.  It's my understanding that authenticated connections automatically bypass the Exchange AntiSpam filters and so this shouldn't happen, so I'm confused as to what's going on.  

The full telnet connection transcript is as follows:

220 *** Microsoft ESMTP MAIL Service ready at Wed, 2 Jan 2013
 17:31:17 +0000
ehlo
250-*** Hello [***]
250-SIZE 10485760
250-DSN
250 AUTH LOGIN
auth login
334 VXNlcm5hbWU6
*** UGFzc3dvcmQ6
*** 2.7.0 Authentication successful
mail from: ***
250 2.1.0 Sender OK
rcpt to: ***
250 2.1.5 Recipient OK
data
354 Start mail input; end with <CRLF>.<CRLF>
test
.
550 ######## SPAM EMAIL NOT ACCEPTED ########

I also tried allowing anonymous connections on that receive connector, then running the PowerShell command to set anonymous connections to bypass the Exhange AntiSpam filters, but I get the same issue.

Any help much appreciated.

KP57610
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caronas

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mtxit

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Thanks caronas and Sembee2, it turned out to be a combination of two issues - I wasn't formatting the email correctly within telnet, and a third-party anti-spam filter (Exclaimer Anti-Spam) was rejecting the mails.