I installed Snow Leopard yesterday. When I came down this morning I discovered that all of my rogers.com email boxes had 4 copies of each email in each in box. The me.com mailbox did not have this issue. I put them all off-line when it appeared that copy number 5 was starting to download. The box to delete files on the server had ben reinstated for one of the rogers accounts, which had not been set in Leopard. I have used this computer since late May using Leopard without this problem. Any suggestions? I haven't yet called Apple or Rogers.
I am experiencing a similar issue. Two copies of each message addressed to my company Exchange account. After I open and read one copy, the extra one disappears when I attempt to open it. I have not yet found a work around. I am reluctant to trash my mail prefs file because that action requires that I reenter all my account information for six accounts. Deleting the mail caches and rebuilding them did not remedy the problem.
I'm having the same problem. Twice now I have deleted these mass dupes (over 2700) that Mail re-downloaded from my POP Yahoo! account only to see them return. At this point I'm curious to see if they get downloaded again if I do not delete the dupes. From what others have said, it appears that they may in fact get downloaded again.
I checked my MessageUidsAlreadyDownloaded3 file and it's last update was after the most recent mass download. Assumingly then, it is being updated, but perhaps incorrectly. I may try doing as you suggest and deleting the file to allow it to be rebuilt.
Question though - my goal is to retain the copies of these messages that were already in my mail library. I want to retain the reply, forward, flagged, etc indicators that some of the messages have been tagged with from normal mail management. So, I don't really have use for the newly downloaded copies assuming it will only happen once more if this procedure does indeed fix the problem. If I delete the file, relaunch mail and get another mass download, should I be able to delete these new dupes without having that action set off another download (assuming the file recreation fixes the problem)? My thinking is that it should be ok as I would guess that the MessageUidsAlreadyDownloaded3 file doesn't force a re-download of messages just because you have permanently deleted them locally - under normal operation of course. Is this accurate?
You have guessed correctly, in my experience. The only thing that could impact that, would be if you had the selection in Mail Preferences/Accounts/Advanced to remove from server when removed from the Inbox -- it seems you would not have that selection, so should not impact.
Mail is officially out of control - I just watched it download 3240 messages, each the 7th duplicate, and then do it again for the 8th set, a minute later.....
Thanks as well Ernie. I am trying the suggesting and the new download is proceeding. This will hopefully be the last one. Just for testing purposes, I will not delete the dupes for awhile - just to see if another download gets triggered. Later on tonight, if all is well, I will do the deletions and see if things stay fixed. I’ll report back.
How frequently do you have these different email clients checking for New Mail on these same POP accounts? This is probably a great observation, but I have not had a chance to see this, even though I had another computer checking my accounts during certain periods of testing with Mail 4.0.
One machine is set to 1 minute, the other is set to 5 minutes. If I shut down one client (say for 24 hours) there are no duplicates. If I have two clients running, it is virtually a guaranteed event.
It would not happen with IMAP accounts, but IMAP accounts could impact how long the client needs to finish checking. With multiple accounts, I would never suggest anything shorter than 5 minutes.
I repeat: this is a great observation! I think you need to test with other intervals before a good bug report (if it is a bug) could be filed. Also, specific mail servers may be more prone to let this corruption happen.
I have already tested with various intervals and the bug is reproducible. It only occurs with Snow Leopard Mail Clients (v4.0). Does not happen with Leopard.
The bug is reproducible in Snow Leopard Mail v4.0, if any other mail client is checking the same POP account. That includes Outlook, Leopard Mail, Eudora.
The duplicate emails occur only in the Snow Leopard Mail 4.0 client, not other clients that are running concurrently.
