(lemacs.info)Rmail Output

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Copying Messages Out to Files

     Append a copy of the current message to the file FILE, writing it
     in Rmail file format (`rmail-output-to-rmail-file').

     Append a copy of the current message to the file FILE, writing it
     in Unix mail file format (`rmail-output').

   If an Rmail file has no inboxes, use explicit `o' commands to write
Rmail files.

   `o' (`rmail-output-to-rmail-file') appends the current message in
Rmail format to the end of a specified file.  This is the best command
to use to move messages between Rmail files.  If you are currently
visiting the other Rmail file, copying is done into the other file's
Emacs buffer instead.  You should eventually save the buffer on disk.

   The `C-o' (`rmail-output') command in Rmail appends a copy of the
current message to a specified file, in Unix mail file format.  This is
useful for moving messages into files to be read by other mail
processors that do not understand Rmail format.

   Copying a message with `o' or `C-o' gives the original copy of the
message the `filed' attribute. `filed' appears in the mode line when
such a message is current.

   Normally you should use only `o' to output messages to other Rmail
files, never `C-o'.  But it is also safe if you always use `C-o', never
`o'.  When a file is visited in Rmail, the last message is checked, and
if it is in Unix format, the entire file is scanned and all Unix-format
messages are converted to Rmail format.  (The reason for checking the
last message is that scanning the file is slow and most Rmail files
have only Rmail format messages.)  If you use `C-o' consistently, the
last message is guaranteed to be in Unix format, so Rmail will convert
all messages properly.

   When you and other users want to append mail to the same file, you
probably always want to use `C-o' instead of `o'.  Other mail
processors may not know Rmail format but will know Unix format.

   In any case, always use `o' to add to an Rmail file that is being
visited in Rmail.  Adding messages with `C-o' to the actual disk file
will trigger a "simultaneous editing" warning when you ask to save the
Emacs buffer, and the messages will be lost if you do save.

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