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Why will Exchange 2007 not deliver to this address
Posted on 2010-09-08
I have a user that always get this notification when emailing to the address listed. He can send email to this address without problem from his gmail accaount. Please Advise.
Delivery is delayed to these recipients or distribution lists:
contato@grupoconecta.com.b
Subject: flow-rite valves
This message has not yet been delivered. Microsoft Exchange will continue to try delivering the message on your behalf.
Delivery of this message will be attempted until 8/27/2010 10:58:15 AM (GMT-05:00) Eastern Time (US & Canada). Microsoft Exchange will notify you if the message can't be delivered by that time.
Delivery is delayed to these recipients or distribution lists:
contato@grupoconecta.com.b
Subject: flow-rite valves
This message has not yet been delivered. Microsoft Exchange will continue to try delivering the message on your behalf.
Delivery of this message will be attempted until 8/27/2010 10:58:15 AM (GMT-05:00) Eastern Time (US & Canada). Microsoft Exchange will notify you if the message can't be delivered by that time.
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33 Comments
perform an nslookup from the exchange server for the mx record of that domain
nslookup
set type=mx
grupoconecta.com.br
then attempt to connect to the server on port 25
telnet mx.grupoconecta.com.br 25
ehlo yourdomain.com
nslookup
set type=mx
grupoconecta.com.br
then attempt to connect to the server on port 25
telnet mx.grupoconecta.com.br 25
ehlo yourdomain.com
Please take a look in the Exchange queues.
Also try the "telnet test" from your Exchange server:
http://support.microsoft.com/kb/153119
and let us know the results.
did you get "4.7.1 Client host rejected: cannot find your hostname"?
Also try the "telnet test" from your Exchange server:
http://support.microsoft.com/kb/153119
and let us know the results.
did you get "4.7.1 Client host rejected: cannot find your hostname"?
Active 1 day ago
I can't connect to their server via Telnet! Possibly a config issue with their server.
What is your domain name and IP address - I will check that you are configured properly (and I will obscure / hide / delete the domain name and IP address once you post it).
Alan
What is your domain name and IP address - I will check that you are configured properly (and I will obscure / hide / delete the domain name and IP address once you post it).
Alan
Alan,
IP for exchange? And not sure if I am comfortable giving that info out? Isnt that a security concern? I am not familiar with Telnet.
IP for exchange? And not sure if I am comfortable giving that info out? Isnt that a security concern? I am not familiar with Telnet.
Active 1 day ago
If you don't want to post the info (which I appreciate), you can email me at alan @ it-eye.co.uk.
I am a Zone Advisor and can hide / delete / modify your comments, so the info mwould not be made publicly available once I have obscured it.
I am a Zone Advisor and can hide / delete / modify your comments, so the info mwould not be made publicly available once I have obscured it.
Telnet mx.grupoconecta.com.br 25 error:
450 4.7.1 Client host rejected: cannot find your hostname, [216.120.xxx.xxx]
Telnet mx.grupoconecta.com.br error:
Connecting To mx.grupoconecta.com.br...C
port 23: Connect failed
450 4.7.1 Client host rejected: cannot find your hostname, [216.120.xxx.xxx]
Telnet mx.grupoconecta.com.br error:
Connecting To mx.grupoconecta.com.br...C
port 23: Connect failed
OK so because we cant telnet to them we are blocked somehow on there end. As I am not familiar with telnet other than what I just googled and experienced here, I am curious to understand how telneting determines that. Can you explain briefly and I shall close this question. Thanks Everyone for all your help.
Active 1 day ago
You have an MX record with a Priority of 0 - some mail server cannot work with this priority record. Please change it to anyting other than 0.
Your Reverse DNS is configured as flowrite01.yourdomain.com yet your mail server is configured as mail.yourdomain.com - they need to match.
mail.yourdomain.com resolves happily to your IP Address - so that is good.
You are also listed on Backscatterer.org (a blacklist) :
http://www.mxtoolbox.com/S
Please issue the following command from the Exchange Management Shell:
Set-RecipientFilterConfig -RecipientValidationEnable
Your Reverse DNS is configured as flowrite01.yourdomain.com yet your mail server is configured as mail.yourdomain.com - they need to match.
mail.yourdomain.com resolves happily to your IP Address - so that is good.
You are also listed on Backscatterer.org (a blacklist) :
http://www.mxtoolbox.com/S
Please issue the following command from the Exchange Management Shell:
Set-RecipientFilterConfig -RecipientValidationEnable
when you telnet via port 25 to the other email server, you can see the response from the other email server; if the response is an error, such as "Client host rejected: cannot find your hostname" you can act accordingly; this would be the error your exchange server is getting from the remote email server
Active 1 day ago
http:#a33628740 posted the IP address which I only just obscured.
Alan,
DNS is my week spot as I havent worked with it since my formal training 3 years ago. I can not find on our domain controller in DNS the MX record or reverse DNS you mention. Can you advise.
DNS is my week spot as I havent worked with it since my formal training 3 years ago. I can not find on our domain controller in DNS the MX record or reverse DNS you mention. Can you advise.
Active 1 day ago
Reverse DNS is setup via your ISP - you need to call them and ask them to change it for you.
not yet also, you said priority was set to 0 in a previous post and it was not. Just wondering if this changes your recommendations based on it was already where it should be.....
Active 1 day ago
The MX priority will affect inbound - it won't affect outbound. I am just being tidy : )
Active 1 day ago
Extract from www.dnsstuff.com for your domain (assuming I have the domain name correct):
Your 1 MX record is:
0 mail.your-domain.com. [TTL=3600] IP=216.120.xxx.xxx [TTL=3600] [US]
Your 1 MX record is:
0 mail.your-domain.com. [TTL=3600] IP=216.120.xxx.xxx [TTL=3600] [US]
Alan,
I turned on the recipient validation. Sound like this will block a lot of spam before its even filtered by our Ninja Spam filter? Seems like the Spam filter should be doing that before it hits Exchange? I am waiting for my ISP to get back to me on the reverse DNS we have discussed it. The mentioned flowrite01 is a long ago decomissioned server?
I turned on the recipient validation. Sound like this will block a lot of spam before its even filtered by our Ninja Spam filter? Seems like the Spam filter should be doing that before it hits Exchange? I am waiting for my ISP to get back to me on the reverse DNS we have discussed it. The mentioned flowrite01 is a long ago decomissioned server?
Active 1 day ago
I just sent a test message to "contato@grupoconecta.com.
This suggests that the problem is definitely at your end.
This suggests that the problem is definitely at your end.
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