Hi Shailesh,

This error has to do with a issue within Exchange. It can be resolved by restarting the Transport Service in Exchange. Please have a look at the link below which discusses my suggestion.

http://blogs.msdn.com/b/echarran/archive/2007/04/30/4-3-1-insufficient-system-resources-in-exchange-server-2007.aspx

HTH

King regards,

Yannick

Hi Shailesh,

I have not heard back regarding my last response. Did my suggestion assist you in any way?

Kind Regards,

Yannick

Hi Yannicka,

I followed your instructions and deleted mails from mail server but that too didn't help out.

please assist to resolve this issue.

Thanks
Shailesh

Hi K2-Kanchenjunga,

The "4.3.1 Insufficient system resources." error is the response from your SMTP server.

I would suggest the following:

Restart the transport service on exchange under services.

1. 
   
2. How to restart Exchange 2007 Transport service
   
3. http://exchangeserverpro.com/external-mail-flow-working-exchange-server-2013-sp1-upgrade/
   

Hope this help

Kind Regards

Julia

Hi Shailesh,

Thank you for your response. Can you please confirm for me if any of the configuration settings have been reset? Also would you please confirm that the relays are setup correctly. The error is a Exchange specific issue not a K2 one.

Here are a couple of articles that might be of interest to you.
- http://www.vircom.com/security/how-to-troubleshoot-insufficient-system-resources-errors-on-exchange/?doing_wp_cron=1392129472.1339120864868164062500
- http://exchangepedia.com/2007/03/exchange-server-2007-transport-452-4-3-1-insufficient-system-resources.html
- http://kx.cloudingenium.com/microsoft/servers/exchange/exchange-2010/how-to-fix-error-452-4-3-1-insufficient-system-resources-on-exchange-server-2007-or-2010/
- http://stephensonger.wordpress.com/2011/05/05/error-insufficient-system-storage-the-server-response-was-4-3-1-insufficient-system-resources/
- http://support.microsoft.com/kb/153119/en-us

You will need to ask your email administrator to investigate why the mail server is reporting "insufficient system resources". Once that is corrected, you should be able to retry any errored instances.

Hope this helps.

Kind regards,

Yannick