hi,

I've perform a Exch2010 installation coexist with Exch2003. 

Our org. is using Internet Email (pop & smtp) to send and receive email using Outlook.

Previously all Outlook is pointing to Exch2003 (mailsvr), and now after Exch2010 get in, we point to the new server (exchsvr), 

problem happen that some user need to change the smtp back to mailsvr in order to send email to external domain, but some user able to send email to external if the smtp point to exchsvr.

why doest it happen? 

Hi

You wouldnt need to change settings. You can create a routing group connector between 2010-2003 and vice versa and mail will route out. You can also set your send connector on Exchange 2010 to send mail to the internet, you will need to check with your ISP that they will allow that mail server access to route mail.

this is the printscreen of my ESM and EMC.

ESM

EMC

In the ESM connector, do i need to delete the SMTP outound? Because it already in the EMC?

problem have been resolved.

• Marked as answer by Mohd Khairul Nizam 6 hours 49 minutes ago