Mark Lehrer writes: 

> 
> I have a question about the pop3 server; I have been using Courier
> for awhile and I have several users who unfortunately like to leave
> their mail on the server for 7 days. 
> 
> The problem I have is that it appears that the pop3 server is reading
> the contents of every email... when you have 3 users simultaneously
> reading 100 megabytes of mail every 5 minutes, it leads to significant
> degradation of performance on the server.

Certain POP3 commands require the entire mailbox to be rescanned. 

> My key reason for making the switch to Maildirs was to avoid this kind
> of thrashing.  Has anyone else run into this?  Is there a setting in
> pop3d that I can use to have it only read the headers, or does pop3
> have to read the complete contents?

You're using the wrong tool for the job.  POP3 is not designed for 
hundred-megabyte mailboxes.  That's what IMAP's for.  POP3's purpose is to 
serve as a means to download mail from an external mailbox, and that's it. 

-- 
Sam 


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