k-ster said:
Does anyone know how to force Outlook to not download emails older
than 10 days from a POP account? For some reason, Outlook has just
started downloading EVERY old message in my POP account (I don't
delete them because, well, disk space is basically free, and it is an
easy way to archive). I can't find a switch or setting to change
that will stop this.
When a mail client like Outlook and a mail server holding a mailbox talk to
each other, the client asks the server how many messages are in the mailbox
and the server answers with the number. If that number isn't zero, the
client asks the server for the "UIDL" value of each message and compares it
with the list if UIDL values that it has from previous downloads. If any
UIDLs the server sends don't match the UIDLs the client remembers, then the
client assumes the messages are new and asks the server to send those
particular messages.
Sometimes, Outlook can lose track of its UIDL list and re-download messages
it has already seen. This can usually be fixed by creating a new mail
profile with Control Panel's Mail applet, since the UIDL list is kept in the
mail profile in the registry and not in a file, as some mail clients do.
Creating a new mail profile creates a new UIDL cache, which will result in
all messages being downloaded again one more time but after that, Outlook
should properly remember what it has downloaded and what it has not.
There are a few ways to deal with the extra download after creating the new
profile. One way is to create a new PST, switch the delivery location to
the new PST (which involves stopping and restarting Outlook), download once
(which will download everything on the server and populate the UIDL cache),
then swith the delivery location back to the original PST (involving
stopping and restarting Outlook again). Another way is to simply allow
Outlook to download everything again, making duplicates in your Inbox, then
eliminating those duplpicates with a thrid-party duplicate eliminator
application, some of which (including one free one) can be found at
http://www.slipstick.com/addins/mail_duplicates.asp