Re: [fetchmail]Fixed UIDL + IMAP patch

> Translated: the UID never changes, unless the server for some reason loses
> its state and has to renumber the messages from scratch. In that case, the
> UIDVALIDITY changes to allow the client to detect that this renumbering has
> taken place.
However, there is no guarantee against two different servers using
the same UID for completely unrelated messages.  I suspect that
may be what was meant by "globally unique" earlier in the thread.