since empirically it appears that storing the UIDL values is close to the
last thing Outlook does in the cycle. Interruption of the cycle for any
reason seems to prevent the recording of the UIDL values.

And, there's no reason for that unless someone forgot to add a Try Catch
block somewhere since AFAIK Outlook has to retrieve the UIDL's BEFORE it
starts to download the messages so it *knows* what id's to save at ANY point
during the message retieval process. It just freaks out and forgets to do
so. OE does not have this problem and neither does Thunderbird or any other
POP3 client on this planet that I have ever used including 15 year old
old-school Pine. ;-) Only Outlook.

I don't think rules moving the messages has any bearing on whether or not
Outlook remembers what it has downloaded.

Hmm. Haven't experimented much. But, I think if the message stays in your
default Inbox, Outlook "notices" that even sans the UIDL cache and doesn't
re-download the message. I might be wrong about that and Outlook is even
dumber than I'm giving it credit for.

--
-C. Moya
www.cmoya.com
"Brian Tillman" wrote in message
...
CMM wrote:

However, I do believe it has to do with rules moving messages to
another PST.... which I thought was a problem squashed years and
years ago. It's not like the messages are moving to the moon.... the
PST is right there in the profile. And it's not like the Server
"hanging up" the download should prevent Outlook from saving ID's of
messages it has ALREADY downloaded.

I don't think rules moving the messages has any bearing on whether or not
Outlook remembers what it has downloaded. However, loss of connection
during the send/receive cycle does affect that, since empirically it
appears that storing the UIDL values is close to the last thing Outlook
does in the cycle. Interruption of the cycle for any reason seems to
prevent the recording of the UIDL values.
--
Brian Tillman