In which online mail client is it possible to add several mailboxes (imap i.mail) and read letters from these boxes on one page?

Question

Mail server

Tell me, please,
our mail languages ​​are mainly stored on e-mail (several different domains), sometimes they meet mailers
I want to install an online e-mail client (web-based, php + ajax is desirable)
with the possibility of minimal ability to administer users (add / remove them access to mailboxes without giving the passwords to the mailboxes themselves)
creating mailboxes is not a task to create, already write / receive letters from the created mailboxes, for example, I.mail or mailer, maybe by smtp \ imap advise, I’m sitting on
something suitable
I put all the web base clients one by one until I find nothing like this :(

Answer 1

you can have multiple accounts with Evolution and Thunderbird.
https://ubuntuforums.org/showthread.php?t=1353412