SBS 2008 : No Incoming Mail

freshfordian used Ask the Experts™
Hi experts

Server not receiving MAIL.  MX records are pointing firectly to the WAN IP address of the server  

1. Internal mail is working fine.
2. Outgoing Mal is working fine
3. Have checked mx setup. appears to be fine (see file attached)
4. Appropriate ports (25, 987, 1723, 443, 80, 110) opened on Router. Checked on I can access OWA and RWW no problem

Have I Missed Something??

Any suggestions are welcome.  Thanks in advance for your help.
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Abbas HaidarSenior Infrastructure Manager

are you running out of disk space? can you please let me know how much disk space you have left and what is your disk size?



Thanks for your help

C Partition: Size 126GB Free: 2.27GB

E Partition: Size  239GB Free 186GB
Senior Infrastructure Manager
ok it is definitley disk space issue. try to free some disk space, maybe try to move the exchange database to the other partition using the sbs console or try to move wsus the same way, just free up to 12 gb and you will see that it will definitley work!
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Most Valuable Expert 2017

As suggested above please free up some space in the exchange installed partition.

Exchange/DB installed in C or E?
If installed in C drive please try to move to E drive.
Kash2nd Line Engineer

what can you see in the queue. 2GB is very low disk space on the main drive though
ChrisLead Infrastructure Architect
use this to see if you have any external issues

does the exchange queue show items being held for local delivery


Hi all

Thank you for your suggestions.  here is what I have done to anser them:

1. Databases have beem moved from C to E as suggested. Has not helped.
2. Moved Public Folder through SBS 2008 Console successfully this increasing space to 2.91GB (not sure what else I can move.
3. Accepted domain had been configured. Cheked it again and setting are ok.
4. Not using POP3 mail. configureded as SMTP server.
5. Inbound smtp mail test is failing. Here is the result of ExRCA test

Testing inbound SMTP mail flow for domain

ExRCA failed to test inbound SMTP mail flow.
Test Steps
Attempting to retrieve DNS MX records for domain
One or more MX records were successfully retrieved from DNS.
Additional Details
MX Records Host, Preference 10
Testing Mail Exchanger
One or more SMTP tests failed for this Mail Exchanger.
Test Steps
Attempting to resolve the host name in DNS.
The host name resolved successfully.
Additional Details

IP addresses returned:

Testing TCP port 25 on host to ensure it's listening and open.

The port was opened successfully.

Additional Details

Banner received: 220 Microsoft ESMTP MAIL Service ready at Tue, 22 May 2012 20:38:09 +0100

 Attempting to send a test e-mail message to using MX

Delivery of the test message failed.

Additional Details

The server returned status code 452 - Insufficient system storage. The server response was: 4.3.1 Insufficient system resources
Exception details:
Message: Insufficient system storage. The server response was: 4.3.1 Insufficient system resources
Type: System.Net.Mail.SmtpException
Stack trace:
 at System.Net.Mail.MailCommand.CheckResponse(SmtpStatusCode statusCode, String response)
 at System.Net.Mail.MailCommand.Send(SmtpConnection conn, Byte[] command, String from)
 at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, SmtpFailedRecipientException& exception)
 at System.Net.Mail.SmtpClient.Send(MailMessage message)
 at Microsoft.Exchange.Tools.ExRca.Tests.SmtpMessageTest.PerformTestReally()

 Looks like a Storage Problem!!


Big Thank You to everyone for all your help.  The Space issue was the problem as initially outlined by absi81. I was able to determine this ultimately thanks to the link provided by irweazelwallace.  Great Outcome.

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