Hello, I have serveral emails in a few domains (email@domain1, email@domain2, email@domain3).

Currently they are on an owned email server and I am collecting emails via IMAP protocol (i would not like to use POP..) in Thunderbird.

I have a few partners and I want to allow them to access the same email address.

Here is what I desired:

All users can open All the inboxes via IMAP @ Thunderbird (with proper configuration)

at the same time, there are a webmail system, every user can login their account (userA, userB, userC),

and they will see all inboxes (email@domain1, email@domain2, email@domain3)

Would you recommend any suite that fits my needs?

Either (a system to be installed on my server) or (a remote service where I need to config MX records) will do.

Thank you.