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Can't send or receive email from outside

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by mark_ullman

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Hello,

The company I work for has an Exchange 5.5 server with SP4, running on NT4.0 server with SP6a. About a month ago, the server crashed and unfortunatly, I was unable to restore the email from tape backup. I re-installed, configured installedSP4 and re-created the mailboxes for each user.

Everything ran fine for about 2 weeks. Users were able to send and receive emails from inside and from outside the company.

Since about a week ago, no one is able to send anything outside the company, or receive emails from outside the company, although we can send and receive emails inside the company.

Our router has ports 110 and 25 open and our internet mail connector has the correct mail addressing scheme, (using SMPT and X400).

Ichecked the event logs and see that the POP3 logon and authentication is OK.
When we try to send an email out, we get an error: MSEXCH:IMS:domainname:domainname:servername 3553 553 malformed address NOTIFY=FAILURE DELAY

When someone tries to email us from outside, there email, they get the message:
The following recipient(s) could not be reached:
UserName on 3/16/03 6:58 AM
The recipient was unavailable to take delivery of the message.
The MTS-ID of the original message is: c=US;a=;p=Micromed;1=SERVERNAME-030314115745Z-281063
MSEXCH:IMSMicromed:Horsham:SERVERNAME 3499 (000B09AA) Host unreachable

Any help would be greatly appreciated!

Thank you very much

Mark

2 replies

by curlergirl

Sounds like something is wrong with your address space and/or routing settings in the IMC. In the Exchange Admin program, go to the Connectors container and open the Internet Mail Connector properties. Look on the Address Space tab, and make sure it looks like:

SMTP * 1

There shouldn't be any other entries on this tab. On the Routing tab, you should have "Do not reroute incoming mail" selected, unless you're using POP3/IMAP support, in which case you need to select the second button and put in your domain information. Also, on the routing tab, make sure that you do not have an open relay, as this could cause other problems - you should be allowing relay only for authenticated clients.

Hope this helps!

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