integrating Second E-Mail in ZOHO CRM which is used by ZOHO Campaign as replay

integrating Second E-Mail in ZOHO CRM which is used by ZOHO Campaign as replay

How can I integration the E-Mail account (Imap), what is used for ZOHO Campaign into the ZOHO CRM ?

            E.G.: Replay’s (answers) from E-Mail-Campaigns

Background:

1.       We are using office 365 as our standard accounts. The personal E-mails are used in the ZOHO CRM .

2.       For ZOHO campaign we are using a separated Imap account with a different Domain (not 365).

My first Idea, using the BCC Dropbox, where each Replay is forwarded to the BBC Dropbox, is not working 

Any ideas what is the best practice?