Exchange 2010 SP3: 4.3.1 Insufficient system resources

exchange smtp exchange-2010 microsoft-office-365 exchange-hybrid

9,838

Backpressure is caused by low systems resources, which you know that you had. It causes SMTP sessions to be rejected or delayed.

Advice: Move all the logs (IIS, transport protocols, etc) off the system volume.

9,838

john

Technology and programming enthusiast with a solid understanging of network communications. I started out moonlighting as a PHP developer and then got hired as a junior technician in a school. Now, 10 years on, I'm working as a Senior Tech in Infrastructure for an Engineering company. I still maintain my web development skills when I can. My main areas of expertise are automation, virtualisation and storage. I don't think there's ever a time when I don't have a PowerShell console open. I maintain a VM infrastructure, a hybrid Office 365 implementation and an AD forest.

Updated on September 18, 2022

Comments

john over 1 year

We have Office 365 with a hybrid deployment. Our on-premise server is relaying email directly out to the web (not via EOP). domain-a.com is an accepted domain on our on-premise server; domain-b.com is not.

The issue we have had was that the on-premise server was a bit low on space on the C: volume and the transport server was rejecting emails with a from address of domain-b.com, but not domain-a.com. The error message received was:

send-mailmessage : Insufficient system storage. The server response was: 4.3.1 Insufficient system resources   
    At line:1 char:1                                                                                               
    + send-mailmessage -to [email protected] -Subject test -from [email protected]                       
    + ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~                             
        + CategoryInfo          : InvalidOperation: (System.Net.Mail.SmtpClient:SmtpClient) [Send-MailMessage],SmtpException                                                                                                  
        + FullyQualifiedErrorId : SmtpException,Microsoft.PowerShell.Commands.SendMailMessage

Once I had cleared down the log files in IIS, email was successfully relayed for both domains. What could be the explanation for this? I'm not sure where to start.

Rich701 over 9 years

This article may help explain...? http://technet.microsoft.com/en-us/library/bb201658(v=exchg.‌150).aspx

john almost 10 years

I understand what the solution was in general, but it doesn't explain why it works for one and not the other.
mfinni over 9 years

Perhaps they came in on different connectors that have different rules? I don't know, you need to tell us more about your environment.