Re: rmail produces mail duplicates when rmail-preserve-inbox is t

[Eli Zaretskii]

> Date: Thu, 07 Nov 2013 14:12:39 +0100
> From: Jarek Czekalski <jarekczek@poczta.onet.pl>
> 
> What I try to do is reading emails taken from POP3 server using Emacs, 
> while not removing messages from server. I found a related Info section:
> 
> If `rmail-preserve-inbox' is non-`nil', then Rmail does not
> clear out the inbox file when it gets new mail.  You may wish to set
> this, for example, on a portable computer you use to check your mail
> via POP while traveling, so that your mail will remain on the server
> and you can save it later on your workstation.
> 
> Unfortunately now every time I press "g" (rmail-summary-get-new-mail) I 
> get duplicates of the messages I already downloaded. Pop3 clients don't 
> work this way.
> 
> Am I missing something or does Emacs?

You are not missing anything, Rmail simply doesn't know how to track
the last message seen from a given inbox.  Patches to add that are
welcome.