Mail Receiving Options Mail receiving options for common server types IMAP+ receiving options — Receiving options for IMAP+ accounts. POP receiving options — Receiving options for POP accounts. Usenet news receiving options — Receiving options for Usenet news accounts. Mail receiving options for corporate server types Exchange MAPI receiving options — Receiving options for Exchange MAPI accounts. Exchange Web Services receiving options — Receiving options for Exchange Web Services accounts. Mail receiving options for local account server types Local delivery receiving options — Receiving options for Local delivery accounts. MH-format mail directories receiving options — Receiving options for MH-format mail directories accounts. Maildir-format mail directories receiving options — Receiving options for Maildir-format mail directories accounts. Standard Unix mbox spool directory receiving options — Receiving options for standard Unix mbox spool directory accounts. Standard Unix mbox spool file receiving options — Receiving options for standard Unix mbox spool file accounts.