pop clients getting duplicate emails from a fc4 server

Tim ignored_mailbox at yahoo.com.au
Thu Dec 15 11:55:05 UTC 2005


On Wed, 2005-12-14 at 15:38 -0800, Christian Motta wrote:
> For some reason my clients that use pop to check email  will keep 
> downloading the same email, or group of emails, or all email from the 
> server over and over again.
> 
> I tell clients to keep mail on the server for 30 days - so they can
> use webmail if need be
> 
> Most of them use outlook but I have seen it happen to thunderbird too.
> 
> I can't figure out is this is a client / dovecot / sendmail issue.

*They* need to use some option to avoid downloading the same message
again in their mail client, and your mail system needs to use the same
unique IDs with the same messages (which is most-likely does).

POP3 doesn't have a way for the server to know what's
new/old/read/unread, for it to hold back old messages and offer new ones
to the client.  It just provides a list of what's on the server for the
client to do whatever it wants to.

-- 
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