is it possible two get the number of messages and the number of the unseen messages, from two mailboxes, in only one imap_status() request?
Thanks for your answers!
No, the STATUS command in IMAP takes one mailbox, and a set of query items.
The STATUS command can, however, be executed in parallel. If your IMAP library doesn't support asynchronous command execution, get a better one.
Make a php loop. If you have 3 mailboxes with different account. So make it a loop to fetch the status one by one.