* Thwarting Email Spam:: Simple ways to avoid unsolicited commercial email.
* Spam Package:: A package for filtering and processing spam.
* The Gnus Registry:: A package for tracking messages by Message-ID.
+* The Gnus Cloud:: A package for synchronizing Gnus marks.
* Other modes:: Interaction with other modes.
* Various Various:: Things that are really various.
@item
@vindex gnus-ignored-from-addresses
-The @code{gnus-ignored-from-addresses} variable says when the @samp{%f}
-summary line spec returns the @code{To}, @code{Newsreader} or
-@code{From} header. If this regexp matches the contents of the
-@code{From} header, the value of the @code{To} or @code{Newsreader}
-headers are used instead.
+The @code{gnus-ignored-from-addresses} variable says when the
+@samp{%f} summary line spec returns the @code{To}, @code{Newsreader}
+or @code{From} header. The variable may be a regexp or a predicate
+function. If this matches the contents of the @code{From}
+header, the value of the @code{To} or @code{Newsreader} headers are
+used instead.
To distinguish regular articles from those where the @code{From} field
has been swapped, a string is prefixed to the @code{To} or
* Thwarting Email Spam:: Simple ways to avoid unsolicited commercial email.
* Spam Package:: A package for filtering and processing spam.
* The Gnus Registry:: A package for tracking messages by Message-ID.
+* The Gnus Cloud:: A package for synchronizing Gnus marks.
* Other modes:: Interaction with other modes.
* Various Various:: Things that are really various.
@end menu
precious.
@end defvar
+@node The Gnus Cloud
+@section The Gnus Cloud
+@cindex cloud
+@cindex gnus-cloud
+@cindex synchronization
+@cindex sync
+@cindex synch
+
+The Gnus Cloud is a way to synchronize marks and general files and
+data across multiple machines.
+
+Very often, you want all your marks (what articles you've read, which
+ones were important, and so on) to be synchronized between several
+machines. With IMAP, that's built into the protocol, so you can read
+nnimap groups from many machines and they are automatically
+synchronized. But NNTP, nnrss, and many other backends do not store
+marks, so you have to do it locally.
+
+The Gnus Cloud package stores the marks, plus any files you choose, on
+an IMAP server in a special folder. It's like a
+DropTorrentSyncBoxOakTree(TM).
+
+@menu
+* Gnus Cloud Setup::
+* Gnus Cloud Usage::
+@end menu
+
+@node Gnus Cloud Setup
+@subsection Gnus Cloud Setup
+
+Setting up the Gnus Cloud takes less than a minute. From the Group
+buffer:
+
+Press @kbd{^} to go to the Server buffer. Here you'll see all the
+servers that Gnus knows. @xref{Server Buffer}.
+
+Then press @kbd{i} to mark any servers as cloud-synchronized (their marks are synchronized).
+
+Then press @kbd{I} to mark a single server as the cloud host (it must
+be an IMAP server, and will host a special IMAP folder with all the
+synchronization data). This will set the variable
+@code{gnus-cloud-method} (using the Customize facilities), then ask
+you to optionally upload your first CloudSynchronizationDataPack(TM).
+
+@node Gnus Cloud Usage
+@subsection Gnus Cloud Usage
+
+After setting up, you can use these shortcuts from the Group buffer:
+
+@table @kbd
+@item ~ RET
+@item ~ d
+@findex gnus-cloud-download-all-data
+@cindex cloud, download
+Download the latest Gnus Cloud data.
+
+@item ~ u
+@item ~ ~
+@findex gnus-cloud-upload-all-data
+@cindex cloud, download
+Upload the local Gnus Cloud data. Creates a new
+CloudSynchronizationDataPack(TM).
+
+@end table
+
+But wait, there's more. Of course there's more. So much more. You can
+customize all of the following.
+
+@defvar gnus-cloud-synced-files
+These are the files that will be part of every
+CloudSynchronizationDataPack(TM). They are included in every upload,
+so don't synchronize a lot of large files. Files under 100Kb are best.
+@end defvar
+
+@defvar gnus-cloud-storage-method
+This is a choice from several storage methods. It's highly recommended
+to use the EPG facilities. It will be automatic if have GnuPG
+installed and EPG loaded. Otherwise, you could use Base64+gzip,
+Base64, or no encoding.
+@end defvar
+
+@defvar gnus-cloud-interactive
+When this is set, and by default it is, the Gnus Cloud package will
+ask you for confirmation here and there. Leave it on until you're
+comfortable with the package.
+@end defvar
+
+
+@defvar gnus-cloud-method
+The name of the IMAP server to store the
+CloudSynchronizationDataPack(TM)s. It's easiest to set this from the
+Server buffer (@pxref{Gnus Cloud Setup}).
+@end defvar
+
@node Other modes
@section Interaction with other modes