* Red Gnus:: Third time best---Gnus 5.4/5.5.
* Quassia Gnus:: Two times two is four, or Gnus 5.6/5.7.
* Pterodactyl Gnus:: Pentad also starts with P, AKA Gnus 5.8/5.9.
-* Oort Gnus:: It's big. It's far out. Gnus 5.10.
+* Oort Gnus:: It's big. It's far out. Gnus 5.10/5.11.
Customization
@end table
+@vindex pop3-movemail
+@vindex pop3-leave-mail-on-server
If the @code{:program} and @code{:function} keywords aren't specified,
@code{pop3-movemail} will be used. If the
@code{pop3-leave-mail-on-server} is non-@code{nil} the mail is to be
-left on the POP server after fetching.
+left on the @acronym{POP} server after fetching when using
+@code{pop3-movemail}. Note that POP servers maintain no state
+information between sessions, so what the client believes is there and
+what is actually there may not match up. If they do not, then the whole
+thing can fall apart and leave you with a corrupt mailbox.
Here are some examples. Fetch from the default @acronym{POP} server,
using the default user name, and default fetcher:
* Red Gnus:: Third time best---Gnus 5.4/5.5.
* Quassia Gnus:: Two times two is four, or Gnus 5.6/5.7.
* Pterodactyl Gnus:: Pentad also starts with P, AKA Gnus 5.8/5.9.
-* Oort Gnus:: It's big. It's far out. Gnus 5.10.
+* Oort Gnus:: It's big. It's far out. Gnus 5.10/5.11.
@end menu
These lists are, of course, just @emph{short} overviews of the