I read here in the forums about the possibility of login to emails using mailbox.prefix or email@example.com, and the recommendation to mailbox.prefix form (that is default).
But then… i noticed that Roundcube is able to login with firstname.lastname@example.org format!!
While IMAP (through Outlook and other softwares) is not allowing this…
Any guess why Roundcube is able to perform this login even if it’s not enabled (and Roundcube supposingly is using the IMAP to login)?