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exchange server 2003 not sending emails outside our domain

Running server 2003 with exchange. For some reason we cant send email outside of our domain however internal emails are working fine. We cant reply to a email that is from a external account either. We dont get any errors in outlook it appears everything is working fine. I went through the windows logs on server and nothing is logging.
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bankadmin
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bankadmin
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5 Solutions
 
Simon Butler (Sembee)ConsultantCommented:
Unlikely to get anything in Windows Logs.
You need to look in the queue viewer to see whether anything is being reported.

Can you telnet to an external server? It could be that your ISP has blocked port 25 traffic.
This is unlikely to be a local to your server issue, it will be something externally - could be firewall, AV, network connectivity etc.

http://exchange.sembee.info/network/smtp-diag-outbound.asp

Simon.
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bankadminAuthor Commented:
WHere is the queue viewer?

I dont know of a external server I can telnet to. Same AV, ISP, Firewall as we have always had no config changes
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bankadminAuthor Commented:
I reviewed the link you put in the post and I can connect to my ISP's SMTP server which is what I have configured in exchange to use.
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Brad BouchardInformation Systems Security OfficerCommented:
I assume you mean you are using them as a Smart Host/Send Connector.  Try removing them as a Send Connector.  First make sure you have all the settings written down or screenshotted somewhere.
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Brad BouchardInformation Systems Security OfficerCommented:
WHere is the queue viewer?

In Exchange System Manager > Administrative Groups > first administrative group > Servers > YOURSERVERNAME > Queues

I dont know of a external server I can telnet to. Same AV, ISP, Firewall as we have always had no config changes

Try from some remote connection (perhaps a home computer, offsite server, etc.) to telnet to your external IP address on port 25.

Open Command Prompt > Type (without quotes) "telnet YOUREXTERNALIP 25"

To find your external IP go here:  http://www.whatsmyip.org/

If you can telnet there great, if not, we will troubleshoot further.
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bankadminAuthor Commented:
After some further digging. I have verified that my emails are passing thru my firewall and the IP address of the SMTP server is resolving correctly. I can connect to our ISP's SMTP server via telnet with port 25 specified. I talked with the ISP and he wasnt aware of any issues but he is following up with a "server guy" if one is still there. I am still receiving external emails. Since I can see the traffic leaving the network thru our firewall, I dont think I want to delete the connector and re-create it. Also worth mentioning I have a TLS connector that is only for emails destined for a specific external exchange server and that is still working fine. Seems to me its something with the ISP. Do you guys disagree?
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Brad BouchardInformation Systems Security OfficerCommented:
So do you get any bounce/non delivery messages or what is happening to indicate to you that your messages aren't being sent?
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bankadminAuthor Commented:
No i dont get any kick backs. I was on the phone with a vendor and sent him a email he didnt receive it i did some more testing by sendi.g about a half dozen emails to my personal accomts and they did go thru. I just received a couple of them they took about two hours to deliver
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Simon Butler (Sembee)ConsultantCommented:
If you are seeing the messages go through your system correctly and disapear - as they have been delivered then the problem is with the ISPs system.
If you are on a static IP address then you can get email delivered directly in most cases, you just need to get the ISP to set a PTR on your static address.
Then change the SMTP Connector to send email directly rather than via a smart host.

Simon.
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bankadminAuthor Commented:
Thanks for all your input and i apoligize for not following up when it began working. It ended up being our ISP that day
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