Inbound Email not received and no ndr

I am running Exch Server 6.5 SP2 on on SBS2003 SP2. Three days ago inbound email stopped and senders do not get a ndr. An external check of our MX record returns our public IP address OK.
FyllSeeAsked:
Who is Participating?
 
Alan HardistyConnect With a Mentor Co-OwnerCommented:
Has anonymous access been disabled from the SMTP Virtual Server?  With this disabled - no-one will be able to get any mail in to your server.
0
 
sunnyc7Commented:
Go to
www.testexchangeconnectivity.com

Test for inbound smtp
Post back results here

Thanks
0
 
pgerardCommented:
Ran a telnet to the mail server from an outside source to verify that it is working properly.

At a command line from a remote machine run the following: telnet 1.1.1.1 25

You should receive a HELO from your server.  You can then run the following commands.

mail from: name@domain.com
rcpt to: name2@domain2.com
data
test
.
0
Has Powershell sent you back into the Stone Age?

If managing Active Directory using Windows Powershell® is making you feel like you stepped back in time, you are not alone.  For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why.

 
FyllSeeAuthor Commented:
Result of inbound SMTP mail test using   www.testexchangeconnectivity.com:

Testing Inbound SMTP Mail flow for domain user@domain.co.nz
  Failed to test inbound SMTP mail flow
0
 
Alan HardistyCo-OwnerCommented:
Please visit www.canyouseeme.org and test port 25 to see if that port is open and forwarded on your firewall.
Also - check your firewall to see if the correct ports are open and forwarded.
Worth visiting www.whatismyip.com to check your IP Address is the one you expect it to be.
0
 
FyllSeeAuthor Commented:
pgerard:  I was able to connect with Telnet and receive a hello from the server, but it would not allow me to complete the "mail to" command. The response was:

"454 5.7.3 Client does not have permission to submit mail to this server."
0
 
pgerardCommented:
Check the SMTP Virtual Server in Exchange System Manager.  Right-Click the Default SMTP Virtual Server and select Properties.  Select the Access tab and then check the Authentication.  You should have Anonymous access, Basic authentication, and Integrated Windows Authentication checked.  Also check your Connection button and make sure that the connections are not limited to a specific IP or network.
0
 
FyllSeeAuthor Commented:
Hi Alanhardisty,  In the Exchange smtp virtual server properties>Access Tab>Authentication,  "Anonymous Access" is unchecked. Are you saying it should be checked?
0
 
Alan HardistyCo-OwnerCommented:
Yes - without anonymous access enabled - everyone has to authenticate to your server - only you won't be setting up usernames and passwords for everyone you don't know, so enable anonymous access and your mail-flow should return.
0
 
pgerardCommented:
Yes, that should be checked to allow access to your server from outside sources.
0
 
Alan HardistyCo-OwnerCommented:
What you need to ask now is "Why was it disabled in the first place"?
Possibly to prevent relaying - or for some other reason. How Many Exchange Admins do you have?
0
 
FyllSeeAuthor Commented:
That was it thanks Alanhardisty. Someone's been messin' around in ESM! Heads will roll!
0
 
FyllSeeAuthor Commented:
Very quick response - less than 10 minutes
0
 
Alan HardistyCo-OwnerCommented:
Good news - Hopefully it was for good reasons - despite not knowing what they were doing by unticking anonymous access ; )
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.