Here's the deal. Mail.app is chirping along fine, checking email every minute in the background. I tend to get about five to 10 emails an hour, so there's a pretty steady stream of stuff coming in. Then the stream stops. If I click "Get mail," nothing. I know there must be something, because i haven't received anything in an hour or so. So, I quit mail and relaunch. Boom! Eight new emails. This happens sometimes 10 times a day, sometimes not at all. I say it typically happens at least a couple of times. I know what you're thinking, so without further delay: The basics: 10.4.11 1.8 Ghz Dual G5 Mail.app (2.1.3) Mail.app is connecting to an IMAP server (I think it's called MailMan, and its ancient). It is configured correctly, according to our IT department. Here are the settings: Account type: IMAP Mailbox Behaviors: Drafts, Sent, Junk and Trash all stored on server Account enabled: Yes Account included when auto checking for new mail: Yes Keep copies of messages and attachments for offline viewing: Yes Automatically sync changed mailboxes: Yes IMAP path prefix properly set to my mailbox on port 143 SSL: No Authentication: Password Check mail: Every minute .Mac options: Not using Plugins: MailBadger Mail.appitizer Basic questions, answered: Yes, I've repaired permissions Yes, I've rebuilt the mail database Yes, I've thrown away all plist files and build mail up from the ground No, none of it had any effect (although it might have gotten a little less frequent. Or, it could have been a run of a few good days in a row. ) More random information: I have a Core2Duo MacBook Pro that I use at home. Also 10.4.11. Same mail settings and plugins. It has never had a problem. I've taken said laptop to work and had them both in mail.app at the same time and the G5 has failed while the C2D rocked on. A colleague of mine with a mini has the same problem. This didn't happen on the G5 when I was on 10.3.X. It only happened after the archive an install. Thinking that was the problem, I completely wiped the mail settings and, well, it didn't fix the problem. I've had it crash on a Friday and not update with the IMAP server until I relaunched the app on Monday. This is to say that patience is not an answer. Also interesting to note, I can send email when the problem is happening. So, let's say I send a company-wide email: I won't get it, but everyone else will. This is often how I figure out something's fishy. I won't receive the message until relaunch. So, it seems to me that on launch, mail.app is running a sync with IMAP routine that somehow different that the check-mail routine. Is there an applescript that I can use to invoke this at one-minute intervals? An applescrips cron job seems a bit of a brute-force solution. And, one last piece of info: When I check the Activity Viewer in Mail.app during a "get mail" (either manual or at the one-minute interval), it *says* it's communicating with the server. Strange. Anyone have similar problems. Solutions? Workarounds? Sympathy?