03-28-2018, 09:05 PM
Server protocols such as IMAP4 are designed to be very light on the server so as not to overload them. In addition to this, IMAP4 is an extremely poorly designed protocol. Among the worst of the standard protocols by far. It doesn't follow even standard command mechanisms. Prior to IMAP4, POP3 was the only non standard one. With IMAP4 they had a chance to correct it, instead they made it worse.