int pop_open_mailbox (CONTEXT *);
pop_query_status pop_sync_mailbox (CONTEXT *, int, int *);
int pop_fetch_message (MESSAGE *, CONTEXT *, int);
int pop_open_mailbox (CONTEXT *);
pop_query_status pop_sync_mailbox (CONTEXT *, int, int *);
int pop_fetch_message (MESSAGE *, CONTEXT *, int);