Hi,

On Tue, 12 Dec 2006 14:30:19 +0000 Mick <[EMAIL PROTECTED]>
wrote:

> I have noticed that the bandwidth consumed by an IMAP4 account of
> mine is rather high and I believe this because of the following type
> of behaviour:
> 
> I click to send the message.  The message is uploaded to the server.

...by your client. Noone said that you need to put sent messages also
onto an IMAP, i.e. mail storage server. MTA would be enough in order to
send the mail. But you certainly know...

> I click to sync/receive messages.  The message is uploaded again(!)
> to the server this time in the sent-mail IMAP folder.

Uploaded? I would expect it to get downloaded -- at least, if you're
using cached IMAP. Without cached IMAP, I would expect it to download
headers only.

> I delete the message.
> I click to sync/receive messages.  The message is uploaded again(!)
> to the server, this time in the Trash IMAP folder.

Again, I think it's not uploaded but downloaded instead (i.e. from
server to client). Which would be right, because it might get a new UID
on the server.

> Shouldn't it move from one folder to the other on the server instead
> of it being uploaded afresh from my desktop?

for both cases you marked with "again(!)": yes. But that wouldn't
prevent it from getting downloaded. What makes you think it was
uploaded?

>  It strikes me like a waste of bandwidth.  Is this a typical IMAP4
> server implementation, or should I be having words with my ISP?

I rather guess it's cached IMAP, i.e. a client side configuration issue.

For further inspection, I'd recommend installing tcpflow (better suited
for this than tcpdump) and logging communication with the server. You
could even quote from that communication here.

-hwh
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