Struct.new(:user, :rights, :mailbox)
Net::IMAP::MailboxACLItem
represents the response from GETACL.
acl_data ::= "ACL" SPACE mailbox *(SPACE identifier SPACE rights) identifier ::= astring rights ::= astring
Login name that has certain rights to the mailbox that was specified with the getacl command.
The access rights the indicated user has to the mailbox.