1. Using a web browser, navigate to https://mail.zimbraservice.com and log into the desired mailbox.
2. Select the Mail tap.
3. Locate and open the message containing the sender address you wish to save as a contact.
4. Right-click the sender address or name located in either the To, CC or BCC fields and choose Edit Contact.
5. The New Contact form will pop up with the information available from the header. You will now need to fill out the rest of the contact information. Click Save when completed.