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Can't receive messages from a certain domain
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Can't receive messages from a certain domain - 18.Jun.2007 11:18:12 AM
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bwallen
Posts: 8
Joined: 18.Jun.2007
Status: offline
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I'm now the admin of an exchange 2003 server that has had an entire domain blocked from sending messages to us. I was told that there was someone from that domain who kept spamming us, probably from a virus. The issue is now resolved, but I don't know what the previous guys did to my server to block out the domain. No one from shentel.net can send email to trinitygc.com (my server). Where could I look in exchange to allow these messages again?
P.S. I'm not 100% sure if this is the right forum. Admins, please move this if it's not.
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RE: Can't receive messages from a certain domain - 18.Jun.2007 12:55:57 PM
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uemurad
Posts: 5571
Joined: 7.Jan.2004
From: California, USA
Status: offline
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The blocking could be set at several different places, depending upon what products and services you use.
In Exchange, open the System Manager (ESM) and expand Global Settings. Open the properties of Message Delivery and go to the Sender Filtering tab. If that domain is listed there, remove it then have someone from the other domain try to send you a message.
If that doesn't work, ask them to send you any NDR information they may get and post it here if you aren't able to ascertain its meaning.
_____________________________
Regards,
Dean T. Uemura
Microsoft MVP - Exchange
exchangeguy.blogspot.com
uemurad@yahoo.com
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RE: Can't receive messages from a certain domain - 18.Jun.2007 3:31:38 PM
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bwallen
Posts: 8
Joined: 18.Jun.2007
Status: offline
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I looked in the ESM, but it wasn't listed there. And by NDR, do you mean the mailerdeamon reply the user at shentel.net gets? If so, it doesn't look like the user gets one. I sent a message from shentel.net to trinitygc.com, but I didn't receive the message at trinitygc.com, nor did I get a reply saying it failed. It's only been about 5 or so minutes, so maybe I have to wait a little while longer.
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RE: Can't receive messages from a certain domain - 18.Jun.2007 4:06:57 PM
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uemurad
Posts: 5571
Joined: 7.Jan.2004
From: California, USA
Status: offline
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Try this: http://exchangeguy.blogspot.com/2007/06/using-telnet-to-simulate-server.html
From an outside system, pretend that you are that sending system. That means you will use a sending address in their domain, and a receiving address in yours. See how far into the process you can get until you receive something other than OK. Post your results.
_____________________________
Regards,
Dean T. Uemura
Microsoft MVP - Exchange
exchangeguy.blogspot.com
uemurad@yahoo.com
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RE: Can't receive messages from a certain domain - 19.Jun.2007 8:52:02 AM
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bwallen
Posts: 8
Joined: 18.Jun.2007
Status: offline
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Here is what I did. I hope I did it right. I didn't end up receiving a message on the shentel.net account though.
quote:
brian-wallens-computer:~ bwallen$ telnet 10.106.1.16 25
Trying 10.106.1.16...
Connected to trinitysbs.trinity.local.
Escape character is '^]'.
220 trinitygc.com Microsoft ESMTP MAIL Service, Version: 6.0.3790.1830 ready at Tue, 19 Jun 2007 08:41:54 -0400
ehlo shentel.net
250-trinitygc.com Hello [10.106.1.159]
250-TURN
250-SIZE
250-ETRN
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-8bitmime
250-BINARYMIME
250-CHUNKING
250-VRFY
250-X-EXPS GSSAPI NTLM LOGIN
250-X-EXPS=LOGIN
250-AUTH GSSAPI NTLM LOGIN
250-AUTH=LOGIN
250-X-LINK2STATE
250-XEXCH50
250 OK
mail from:exchange.admin@trinitygc.com
250 2.1.0 exchange.admin@trinitygc.com....Sender OK
rcpt to:mlwiii@shentel.net
250 2.1.5 mlwiii@shentel.net
data
354 Start mail input; end with <CRLF>.<CRLF>
subject: Test message via Telnet
this is a test
.
250 2.6.0 <TRINITYSBSniFKULPEh00000149@trinitygc.com> Queued mail for delivery
quit
221 2.0.0 trinitygc.com Service closing transmission channel
Connection closed by foreign host.
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RE: Can't receive messages from a certain domain - 19.Jun.2007 9:19:37 AM
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uemurad
Posts: 5571
Joined: 7.Jan.2004
From: California, USA
Status: offline
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Use the same telnet command, but reverse the addresses for the Mail From and Rcpt To commands. What you want to simulate is an inbound message from that other domain.
_____________________________
Regards,
Dean T. Uemura
Microsoft MVP - Exchange
exchangeguy.blogspot.com
uemurad@yahoo.com
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RE: Can't receive messages from a certain domain - 19.Jun.2007 9:29:30 AM
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bwallen
Posts: 8
Joined: 18.Jun.2007
Status: offline
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Here it is again. I did what you said and it seemed to work. I also sent a message to myself rather than exchange.admin, but I didn't receive it.
quote:
ehlo mail.shentel.net
250-trinitygc.com Hello [10.106.1.159]
250-TURN
250-SIZE
250-ETRN
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-8bitmime
250-BINARYMIME
250-CHUNKING
250-VRFY
250-X-EXPS GSSAPI NTLM LOGIN
250-X-EXPS=LOGIN
250-AUTH GSSAPI NTLM LOGIN
250-AUTH=LOGIN
250-X-LINK2STATE
250-XEXCH50
250 OK
mail from mlwiii@shentel.net
501 5.5.4 Invalid Address
mail from:mlwiii@shentel.net
250 2.1.0 mlwiii@shentel.net....Sender OK
rcpt to: exchange.admin@trinitygc.com
250 2.1.5 exchange.admin@trinitygc.com
data
354 Start mail input; end with <CRLF>.<CRLF>
subject: this is a test
this is a test
.
250 2.6.0 <TRINITYSBSWrGW6Ex3A0000014d@trinitygc.com> Queued mail for delivery
mail from:mlwiii@shentel.net
250 2.1.0 mlwiii@shentel.net....Sender OK
rcpt to: brianw@trinitygc.com
250 2.1.5 brianw@trinitygc.com
data
354 Start mail input; end with <CRLF>.<CRLF>
asdffdas
.
250 2.6.0 <TRINITYSBSkwtsQztQo0000014e@trinitygc.com> Queued mail for delivery
quit
221 2.0.0 trinitygc.com Service closing transmission channel
Connection closed by foreign host.
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RE: Can't receive messages from a certain domain - 19.Jun.2007 9:43:16 AM
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uemurad
Posts: 5571
Joined: 7.Jan.2004
From: California, USA
Status: offline
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That indicates that Exchange isn't blocking the domain. Next, check Message Tracking to verify whether those two messages were delivered to the mailboxes. Let me know what it says.
_____________________________
Regards,
Dean T. Uemura
Microsoft MVP - Exchange
exchangeguy.blogspot.com
uemurad@yahoo.com
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RE: Can't receive messages from a certain domain - 19.Jun.2007 10:11:04 AM
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bwallen
Posts: 8
Joined: 18.Jun.2007
Status: offline
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Now we're getting somewhere. It says "SMTP: Message deleted by Intelligent Message Filtering". Now I just have to find where Intelligent Message Filtering is.
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RE: Can't receive messages from a certain domain - 19.Jun.2007 11:47:07 AM
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bwallen
Posts: 8
Joined: 18.Jun.2007
Status: offline
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Ok, I finally was able to get it. I had to tell intelligent mail filtering to take no action when it found a message rather than delete it. I still couldn't find anything in exchange that blocked out that domain specifically. It's pretty odd. Hopefully now I won't get tons of spam. Thanks for your help, I really appreciate it.
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RE: Can't receive messages from a certain domain - 26.Jun.2007 3:24:53 PM
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dj_rude
Posts: 15
Joined: 16.Nov.2006
Status: offline
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What would be good IMF value ti set??
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). Glad to hear you figured it out.
