I see it on occasion with my Mac Mail and the Exchange connection. Use the Mailbox > Rebuild to sort things out, that usually fixes the problem for me. > On May 12, 2014, at 2:47 PM, "Gary Schrock" <[log in to unmask]> wrote: > > Mac OS 10.8.5 > Mail 6.6 (1510) > >> On Mon, May 12, 2014 at 2:43 PM, Leo Sell <[log in to unmask]> wrote: >> What version of MacOS / Mail Mail is involved? /L >> >> >> Leo Sell >> IT Services Support >> Michigan State University >> 517-432-6200 >> [log in to unmask] >> >>> On May 12, 2014, at 2:36 PM, Gary Schrock <[log in to unmask]> wrote: >>> >>> I've got one that's kinda been puzzling me. I've got a user that very >>> occasionally finds that his desktop email client (Mac's default email >>> program) will not list an email message while both his phone and the >>> msu webmail client will show it. Eventually, anywhere from a few to >>> 12 hours later, the message will show up on the desktop. Both the >>> phone and desktop client are using imap, and the settings look fine on >>> the client. It doesn't really feel to me like it's an issue on the >>> MSU end, since multiple other imap clients (web and phone) are seeing >>> the message. And as far as he's noticed, it's always been the mac >>> email program that's missing the message. >>> >>> I know MSU's been updating their pop and imap servers, but I don't >>> *think* it's related, since a previous email that he had this problem >>> with happened about a month ago (And that's part of our problem trying >>> to track this down, it's very infrequent, and of course, never happens >>> at a time when I can look at the systems while they're in the state >>> where it's missing the email). >>> >>> He does have a fair amount of email in his inbox on the server, but >>> I've never seen that cause this issue elsewhere. >>> >>> Anyone ever run into something like this? I haven't tried contacting >>> the help desk because like I said, it doesn't really feel to me like >>> it's an issue on the MSU side, and I also haven't been able to catch >>> it during the time when it's happening (I figure maybe at least if I >>> can get it while it's in that state, maybe there's something MSU would >>> be able to find on their end, but when things are working, not much is >>> going to be obvious).