[larrik]

True, looking back I forgot to include the part where they obsessively delete each email from their device after reading it.

The "Leave Mail" option is very important as well, especially when they really just want to leave the mail on the server long enough to get it on multiple devices (especially their main desktop), but the server has absurd size caps.

It's often a case of their expectations having already been set by their history with POP3, so anything working different is not what they want.