I guess the name is either deceiving or indicating the answer to this question, but is OwnCloud to EUMX what OneDrive is to Outlook.com ?
I must embarrassingly admit that the names of those webmail interfaces don't really ring a bell to me, except Horde. I probably have seen webmail with other interfaces named here, without realising though. Only with Horde I know exactly what to expect.
Anyways, all I need is a well functioning webmail, preferably with an overview of previous sign-ins and easy enough for basic communication. I'm not picky, most of those interfaces are relatively unknown to me (I realise I'm a rookie when it comes to technical stuff and terminology
)