Trying to achieve feature parity with cusomt IMAP server

Trying to achieve feature parity with cusomt IMAP server

I'm trying to figure out how to do a couple of different tasks in Zoho mail that I routinely do with a custom IMAP server.

Question 1) Email aliases : I have several email addresses on a domain that do not have a user associated with them. When they receive email they forward it onto 1 or more other email accounts. The other email accounts may or may not be on the same domain.

For example:

Alias email " test@my-domain.com" forwards to 3 email address:
i) admin@my-domain.com
ii) thing1@gmail.com
iii) thing2@another-domain.com

Question 2) Multiple email address for single user. I have several domains, with 20+ email addresses between them, but I only have 4 actual people looking at the emails.

Is it possible to create groups that span multiple domains? For example, I create the following groups:
i) group1@my-domain.com

and I want " thing1@my-domain.com" in the group as well as " thing2@my-other-domain.com" in the group. Both domains would have mail hosted on Zoho mail.

Thanks.