Our company has one special email requirement, for which I'm investigating the simplest solution:

For each incoming message received, every outgoing "reply" must use the "To:" address from the incoming received message as the "From:" address in the outgoing reply.

This is trivial when the incoming has "To: sally@domain.com," Sally reads and replies, and the outgoing message has "From: sally@domain.com"

It's trickier when the incoming has "To: info@domain.com," the MTA delivers to an Exchange server, which distributes that message to Sally, and Salley replies.  What is the simplest way for that outgoing message to use "From: info@domain.com?"

Scope is roughly one hundred (100) different domains and, possibly, thousands of combinations with various username@domain.com.

Exchange is not my expertise; although, I'm confident that I can learn what needs doing.  I have been advised by email experts that MS Exchage can do this with "groups." So, here I am on the Exchange forum asking Exchange experts how to do this?

Please, advise. Thank you.

You can enable it but there is no way you can force it.

Giving Sally the 'Send As' permission to Info mailbox will allow the reply to be from:info. But Sally need to change the from: field before send. The control of from address is with the user.

It's trickier when the incoming has "To: info@domain.com," the MTA delivers to an Exchange server, which distributes that message to Sally, and Salley replies.  What is the simplest way for that outgoing message to use "From: info@domain.com?"

Hi,

Based on this situation, in exchange we can create a distribution group named info. (New-DistributionGroup) Then add Sally and other mailboxes to this group, all messages sent to info group will deliver to Sally and other mailboxes. Next we need to assign info group's "Send As" permission to Sally and other mailboxes with this command

Add-ADPermission -Identity "info" -User "Sally" -AccessRights ExtendedRight -ExtendedRights "Send As"

As what Li Zhen said, users need to change the from: field manually before send.

Best Regards.

Thank you

> As what Li Zhen said, users need to change the from: field manually before send.

Is there no way to automate this?

We do not want to depend on users and human error potential ...

Hi,

I very understand the consequence of human error.

However, based on my knowledge, there is no way to automate change the from: field in this case.

Thanks for understanding.

Best Regards.