You can now personalize your campaign's reply-to address for better reply management. Here's how to do it:
Go to Email Marketing.
Select your campaign and click "Send" or "Schedule."
If the default sender email or global reply-to address isn't suitable, choose "Set a custom reply-to address for this campaign."
Enter your preferred reply email address.

Priority of Reply-To Addresses:
Priority 1: Custom reply-to address set in the campaign's Send or Schedule screen.
Priority 2: Reply address specified in Location Settings -> Email service -> Reply & Forwarding settings.
Priority 3: Current defaults.