Replace recepient when replying e-mail

Hi, good afternoon, team.

I'm currently in a dead-end here. To be honest I actually know nothing about VBA, specially if applied to Outlook, however there is something I need to do in Outlook and I have got to the conclusion the only way to do so is with an outlook macro.

What I'm trying to do is the following:

I would like to have outlook automatically replace a recipient when replying e-mails for another recipient.

Example given:

When I receive an e-mail, if e-mail address "someone[at]example.com" is in the "to" field, have the macro replace that for "someone2[at]example.com" automatically when replying to that e-mail. Most likely when pressing "reply to all".

I'm currently using Microsoft Outlook 2010 (Ver 14.0).
This is for my work exchange e-mail account.

Sorry if I'm not developing a code here and putting it as an example, but I don't currently have the knowledge to do so.

Any help is greatly appreciated.
Thanks in advance!