gnus: Using IMAP

 
 6.3 Using IMAP
 ==============
 
 The most popular mail backend is probably ‘nnimap’, which provides
 access to IMAP servers.  IMAP servers store mail remotely, so the client
 doesn’t store anything locally.  This means that it’s a convenient
 choice when you’re reading your mail from different locations, or with
 different user agents.
 

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