IMAP MSN helper functions.
| Function | Description | Links |
|---|---|---|
| imap_msn_free() | Free the cache | |
| imap_msn_get() | Return the Email associated with an msn | |
| imap_msn_highest() | Return the highest MSN in use | |
| imap_msn_remove() | Remove an entry from the cache | |
| imap_msn_reserve() | Create / reallocate the cache | |
| imap_msn_set() | Cache an Email into a given position | |
| imap_msn_shrink() | Remove a number of entries from the end of the cache |
