i have some issue in configuring this sanario . Can anyone help

1 - mdaemon recieve email from pop account and deliver it to exchange account
2- if exchange user want to send external mail he can send it through mdaemon
3 - exchange user and mdaemon user can send and recieve email from each other
4- if user does exists in mdaemon or exchange the respective mail server will send NDR to user

Sanario Image here

http://postimg.org/image/xmuvq4rl7/

What's the issue you are having...

Also probably you need to ask this to Mdaemon expert or forum to find how it works and how to configure it... On Exchange forum people can say how to configure it from Exchange side based on the more explanation on the issue and the configuration like same  or different smtp address space you have between these two email systems, how mdaemon sends email to Exchange etc...

Hi Mahmood,

Thank you for your question.

By my understanding, the issue is that email could not send to Exchange from Mdaemon.(if I misunderstanding, please be free to let me know)

If the Mdaemon is facing Internet(in your case), you could post it to Mdaemon forum for help.

If the Exchange is facing Internet, we could create smart host on Exchange to forward message to Mdaemon. We could refer to the following link:

https://technet.microsoft.com/en-us/library/jj673059(v=exchg.150).aspx

If there are any questions regarding this issue, please be free to let me know.

Best Regard,

Jim