Changing email addresses

Changing email addresses

Hi
 
I'm about to change to a new email address that will be used to an from my Contacts in Zoho
 
How do I set it up so that:
- emails already tracked against contacts (via the old address) remain and are accessible
- any emails from Contacts still sending to the old address get tracked to that contact and are visible
 
Will I still be able to send to Contacts from the old address (somehow)?
 
Thanks
 
Ross