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From: Kai Grossjohann <kai@emptydomain.de>
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Subject: Re: Questions on using Gnus
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Rajsekar Manokaran <rajsekar@mail.yahoo.co.uk> writes:

> 3. What is this "expunge" ?

Gnus uses it in two ways.  One is the x key in the summary buffer.  It
removes the lines corresponding to read articles from the summary
buffer.  The word also occurs in the context of scoring, where it
means the same thing (except that it happens automatically, of
course).

The second has to do with IMAP.  In IMAP, you mark a message for
deletion.  It doesn't get deleted immediately, but only when you do
the expunge operation.

Kai