How to get access to additional (2e) mailbox via IMAP?

How to get access to additional (2e) mailbox via IMAP?

Hello,

I have successfully migrated a domain I own (e.g. "mydomain.nl") to Zoho mail. There is one user in this domain (e.g. "ton@mydomain.nl"), and I can access the mailbox via my IMAP client. This works well.

Separate from this domain I also have a mail-account at an ISP (e.g "ton@ISPdomain.nl"). Naturally I do not own the ISP's domain, only this one mail-account. This mail-account is POP3, and after verification in Zoho that this is indeed my mail-account, I managed to add it my Zoho account. Now I can also receive and send mails from "ton@ISPdomain.nl" in Zoho webmail. So far so good.

However, what I didn't succeed with sofar is to access the "ton@ISPdomain.nl" mailbox at Zoho via my IMAP client like I access my "ton@mydomain.nl" mailbox. Other than some general guidelines on how to access a mailbox via IMAP I also cannot find anything specific on this topic in the Zoho mail documentation, but maybe I am overlooking something. I am using Thunderbird as my IMAP client.

Hope somebody can point me in the right direction how to solve this.


Thanks, Ton