Referring to reply to an email which is sent on behalf, Outlook is configured to set the reply address to whoever is configured as the sending address. Per your situation, we can configure your Outlook profile to manually configure the reply address. Here
are the reference:
Outlook and hit the New Message option. Once the New Email message window is opened, click the
Options tab and then Hit the Direct Replies To option under the
More Options Section ;
Delivery Options, make sure that the
Have replies sent to check box is checked. Then specify the email address that replies are to be sent to or click the
Select Names button to select the person from your contacts, i.e. your email address ;
Now the replies to this particular email will be send to the your mailbox.
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