Currently Being ModeratedMar 6, 2011 11:07 AM (in response to Philip Shaw)What email provider and do you know if it's an IMAP or a POP?
Check to see if Mail has added your account multiple times. Mail -> Preferences -> Accounts -> Left column has a list of your accounts. If there's more than one double check they're the exact same settings wise and then remove one. Otherwise post back.Macbook Air 11", Mac OS X (10.6.6), iPod Touch 4G
Currently Being ModeratedMar 6, 2011 11:18 AM (in response to T5GP5Ox32)Thanks, checked that out and I've got one POP Account, highlighted and an IMAP Account which is not highlighted. So I dunno if that's it. Any other suggestions?iMac G4 Flat Screen, Mac OS X (10.4.1)
Currently Being ModeratedMar 23, 2011 12:44 PM (in response to keulu)I have the same problem - duplicate emails that started a couple of days ago. Also had the problem for a short time in August but it cleared up but now it's back again.
I downloaded a large update from Apple yesterday but it didn't contain any fix for the Mail duplicating problem.iMac, Mac OS X (10.6.7)
Currently Being ModeratedApr 14, 2011 8:50 AM (in response to Barbara Knights)Also suffering what seems to be same problem here in UK. In addition i am also receiving emails from the server that are over 6 months old can't see why this has started happening although there was a period a year or so ago when same thing occurred but then stopped without me doing anything.!!
Definately seems to be a server / apple thing.MacBook Pro 2.8Ghz 500Gb SSHd, 4Gb Ram, Mac OS X (10.6.4), 1Tb Time Capsule+iPhone+iTouch
Currently Being ModeratedAug 11, 2012 10:15 PM (in response to Philip Shaw)
I acquired my MacBook Pro in very early 2009 and started running Snow Leopard about a year and a half ago... and I just started having this problem today. Repeatedly.
Fortunately, it's affecting just one of the four POP mail accounts I have with my ISP - but it's affecting the one with the most traffic, and it certainly affects messages that Mail's rules automatically shuffle into various folders for me.
I've restarted Mail, repeatedly. I've shut down Mail and pulled MessageUidsAlreadyDownloaded3 out of the Home>Library>Mail folder AND MessageUidsAlreadyDownloaded2 (because, yes, this isn't my first Mac laptop) out of all of the individual account folders. On the strength of some posts that suggested that Time Machine might be the culprit - I don't have a Time Capsule, and I'd cheerfully ignored Time Machine for the last several months - I backed everything up, then told Time Machine not to update MessageUidsAlreadyDownloaded3...
My email archive is a vital part of my work, and it's carefully parceled out among a number of in-folders and out-folders; I am therefore hesitant to pull the plist and risk losing access to all those e-memories.
Next I think I will try pulling MessageUidsAlreadyDownloaded3 AGAIN and restarting the whole darned machine. But might it help if I simply turn Time Machine off till it's wanted? If so, how does one do that?
And what else can I do?