On 2/19/2010 1:56 PM, Rob Kampen wrote: > m.roth at 5-cent.us wrote: >>> Thank you for your helping >>> >>> but why user keeps downloading mails what he downloaded before? >>> >>> I check the mail client setting and it works fine >>> >>> If it is not server control, any hints about this problem >>> >> Here's one example: me. When I'm not at home, I read my email via >> webmail. >> I could, I suppose, d/l it *without* deleting from the server. Then, when >> I get home, I fire up t-bird, and d/l all my mail, this time deleting it. >> >> I might assume that some folks d/l frequently, but do not delete from the >> server, thus saving space on their own system, but storing everything on >> the server. >> > Are you talking about IMAP or POP3 - they behave differently. With POP > each client location has to download and choose to keep original on > server, otherwise only one client can see the email. With IMAP one has > the option to see the headers and by default leaves the server as the > master. This does put more traffic on an IMAP server as a rule, but I > use IMAP in preference if possible so that I can access emails via my > iPhone and my T-bird clients, but only deal with mail once. Yes, if the client in question is using pop, switching to imap is probably a good idea. There is an option in tbird (and probably others) for whether to download all the messages or wait till you read them. -- Les Mikesell lesmikesell at gmail.com