Email - IMAP and POP
Basic differences between IMAP and POP
POP:
offline: yes
online: yes
Mail data is stored on your local PC or on your current workstation.
Viewing the mail database depends on the location (i.e. bound to one location), the mail database is different for multiple locations.
IMAP:
offline: no by default
online: yes
Mail data is always stored on the IMAP server.
The view of the mail database is independent of the location, the mail database is always the same.