A hint if you use multiple mail clients to check one IMAP account

FYI:
Mail.app in leopard turns on an advanced "push" mail feature automatically, called IDLE. This can cause strange problems when you use multiple IMAP clients to access you IMAP server.
For instance, I have a computer in my office and one in my lab. Normally Mail.app is running on them both constantly. After installing Leopard I would sit in my office delete and move messages from my INBOX, and when I went down to the lab I would find those emails still in my INBOX and also in the mailboxes I had moved them to on my office machine. In very short order I ended up with multiple copies of emails in many places and no ability to actually delete mail.
Originally I thought this was a bug with Leopard Mail.app, or a problem with compatibility between Mail.app and the UW IMAP server that I use. I wasted significant time searching on the web for possible solutions.
It turns out that the IDLE feature (that is automatically turned on for you in Leopard) was the cause of my problems. Turning this feature off (in the Advanced pane of the accounts setting) on EACH machine caused me email to return to its previous functional state.
If you only use one IMAP mail client the IDLE feature is nice, it pushes new mail to you as soon as the IMAP server receives the new mail.
(note -- IDLE is also automatically turned on in Thunderbird)

Assuming you're on a NAT'd network, DNS services can cause all sorts of weird errors with the mail server, including spontaneous name changes.
To verify local DNS services, launch Terminal.app from Applications > Utilities and issue the following harmless diagnostic message:
sudo changeip -checkhostname
You'll need to enter an administrative password for the sudo, might see a one-time informational message around the usage of sudo, then you'll see some host and network configuration information, and finally an indication that either no changes are required, or that there are local DNS or the network has configuration issues. Also, make sure you're not using .local or .arpa as the top-level domain within the DNS services.
Public DNS for the mail server can also cause communications issues, if that's not configured correctly — that won't cause the issue you're seeing in the logs here, but it will cause inbound mail to not reach your server, and outbound mail from your server to be dropped by the remote server. To verify your public DNS, launch Terminal.app from Applications > Utilities and issue the commands discussed in this thread or this thread and confirm that your internal and external MX record and your internal and external forward and reverse DNS settings are all correct.

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I need to know if I can have multiple Apple Ids attached to one itunes account. Trying to set facetime up on these separate devices and it keeps failing. Any help would be appreciated. I tried to add additional emails, but I all I get is verifying and it never verifies it.

yes you can still sync all the devices on itunes using one master itunes/appleID account.
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If you want to select specific playlists for your kids, DON'T enable iTunes Match on their devices, otherwise they will get ALL the playlists on their devices (learned that the hard way)
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I manually select which apps they get on their devices using itunes. It only changes when they re-sync.
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Since I also have young kids using these devices:
I have restrictions setup on their devices. I don't allow them to install/delete apps, nor do I allow them to make any account changes on their devices. This way their devices stay in order and get backed up to icloud. I can easily restore their devices if I needed too.
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Checking one IMAP account from 2 different Macs using Mac Mail

Greetings,
New to the forums...
Have recently switched from using POP 3 account methods to IMAP (our new host provider encourages IMAPs, due to e-mail dupes showing up + more stable). Both my biz partner and I check the same accounts form both of our Macs (I check her e-mail, she checks mine, etc.). With the new IMAP accounts, sometimes we both get the same e-mails, other times one of us only gets the e-mail off the server.
Is it NOT possible to have 2 machines check the same IMAP account? (seems like that would be strange, i.e. a work at office/work from home scenario).
Assuming you CAN do this, any clues out there as to what we may be doing incorrect, set up wise?

What you're saying doesn't make much sense to me, so I might be missing something. Anyway, here it goes:
Both my biz partner and I check the same accounts
form both of our Macs (I check her e-mail, she checks
mine, etc.).
With IMAP, that means that whatever changes one of you make (i.e. reading, moving, deleting, etc.) will happen at the other side as well.
With the new IMAP accounts, sometimes we
both get the same e-mails, other times one of us only
gets the e-mail off the server.
Could it be because the message was deleted at the other side?
Is it NOT possible to have 2 machines check the same
IMAP account?
That's exactly what IMAP accounts are for...

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Mail crashes when connecting to IMAP accounts

Hi all,
I have mail set up to check 5 different accounts. One is a POP account and 4 are IMAP accounts (2 gmail, 2 other mail providers).
Initially I had no problems at all with this setup. Mail had mirrored all 4 IMAP accounts and was downloading new messages without a problem. One day, however, something went awry and every time I took one of my Gmail accounts online, Mail would crash. I figured I'd leave that account offline and keep checking that gmail account the regular way.
This worked for a while. More recently though Mail has started crashing when any of my IMAP accounts are taken online. If I leave the 4 IMAP accounts offline and only the POP account online, it does not crash.
Here is what I've tried so far:
Repair permissions/disk.
Erase and Install Tiger (up to 10.4.11)
Moving .mbox files to the desktop and letting mail download the inboxes again (not ideal, the largest inbox is 800MB and a gmail one)
Removing the accounts and starting from scratch.
Nothing seemed to change a thing, Mail now crashes on startup if the IMAP accounts are online (if I take that Mailbox offline, Mail works fine).
I checked the crash reports (which I have been reporting to Apple like crazy, not that they seem to have noticed), and it always seems to be Thread 0 that crashes. Here are the last two crashed Thread 0s:
Thread 0 Crashed:
0 libobjc.A.dylib 0x90a594c7 objc_msgSend + 23
1 com.apple.Foundation 0x9281042f __NSFireMainThreadPerform + 434
2 com.apple.CoreFoundation 0x90860375 __CFRunLoopPerformPerform + 82
3 com.apple.CoreFoundation 0x9082cf32 CFRunLoopRunSpecific + 1213
4 com.apple.CoreFoundation 0x9082ca6e CFRunLoopRunInMode + 61
5 com.apple.HIToolbox 0x92def878 RunCurrentEventLoopInMode + 285
6 com.apple.HIToolbox 0x92deeeb9 ReceiveNextEventCommon + 184
7 com.apple.HIToolbox 0x92deedd9 BlockUntilNextEventMatchingListInMode + 81
8 com.apple.AppKit 0x93275485 _DPSNextEvent + 572
9 com.apple.AppKit 0x93275076 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 137
10 com.apple.AppKit 0x93364a80 -[NSButtonCell performClick:] + 851
11 com.apple.AppKit 0x93362dbc -[NSApplication sendAction:to:from:] + 107
12 com.apple.AppKit 0x93410d0f -[NSMenu performActionForItemAtIndex:] + 455
13 com.apple.AppKit 0x93410a51 -[NSCarbonMenuImpl performActionWithHighlightingForItemAtIndex:] + 103
14 com.apple.AppKit 0x934106a8 -[NSMenu performKeyEquivalent:] + 766
15 com.apple.AppKit 0x934100ca -[NSApplication _handleKeyEquivalent:] + 254
16 com.apple.AppKit 0x93343dbb -[NSApplication sendEvent:] + 3542
17 com.apple.mail 0x00038d0e 0x1000 + 228622
18 com.apple.AppKit 0x9326ee1e -[NSApplication run] + 547
19 com.apple.AppKit 0x93262d4f NSApplicationMain + 573
20 com.apple.mail 0x00094df2 0x1000 + 605682
21 com.apple.mail 0x00094d19 0x1000 + 605465
and
Thread 0 Crashed:
0 libobjc.A.dylib 0x90a594c7 objc_msgSend + 23
1 com.apple.Foundation 0x9281042f __NSFireMainThreadPerform + 434
2 com.apple.CoreFoundation 0x90860375 __CFRunLoopPerformPerform + 82
3 com.apple.CoreFoundation 0x9082cf32 CFRunLoopRunSpecific + 1213
4 com.apple.CoreFoundation 0x9082ca6e CFRunLoopRunInMode + 61
5 com.apple.HIToolbox 0x92def878 RunCurrentEventLoopInMode + 285
6 com.apple.HIToolbox 0x92deeeb9 ReceiveNextEventCommon + 184
7 com.apple.HIToolbox 0x92deedd9 BlockUntilNextEventMatchingListInMode + 81
8 com.apple.AppKit 0x93275485 _DPSNextEvent + 572
9 com.apple.AppKit 0x93275076 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 137
10 com.apple.AppKit 0x93364a80 -[NSButtonCell performClick:] + 851
11 com.apple.AppKit 0x93362dbc -[NSApplication sendAction:to:from:] + 107
12 com.apple.AppKit 0x93410d0f -[NSMenu performActionForItemAtIndex:] + 455
13 com.apple.AppKit 0x93410a51 -[NSCarbonMenuImpl performActionWithHighlightingForItemAtIndex:] + 103
14 com.apple.AppKit 0x934106a8 -[NSMenu performKeyEquivalent:] + 766
15 com.apple.AppKit 0x934100ca -[NSApplication _handleKeyEquivalent:] + 254
16 com.apple.AppKit 0x93343dbb -[NSApplication sendEvent:] + 3542
17 com.apple.mail 0x00038d0e 0x1000 + 228622
18 com.apple.AppKit 0x9326ee1e -[NSApplication run] + 547
19 com.apple.AppKit 0x93262d4f NSApplicationMain + 573
20 com.apple.mail 0x00094df2 0x1000 + 605682
21 com.apple.mail 0x00094d19 0x1000 + 605465
Any help would be greatly appreciated

Have no idea whether this will help or if it's even what resolved my same recent imap problems that involved primarily *GMAIL imaps*, but it seems to be helping.
First, make sure all imap accounts are dragged up to the very top of the inbox/accounts list: *imaps above pops*
(Any IMAP accounts that have multiple folders should be at the top of the imaps).
Second, go into Mail > preference > accounts > [ each imap account ] > Advanced Tab
Above the box for the Port is *_IMAP Path Prefix_:* Type in INBOX
(reminder: If it's gmail, make sure your port is 993 and Use SSL is checked.)
Hope this helps. so far this is what seems to have helped w/mine (i have other problems such as zero results in my smart mailboxes--they no longer work).
I also have a different imap account not google/gmail and I don't use INBOX in the path prefix on that one and it has always worked just fine; the problems started with gmail imaps.
i'll be interested to know if it helps anyone else.
(Note: I manually synchronize the gmail IMAP accounts because having the auto synch box checked also seems to cause problems but your experience may vary)
cheers!
now if anyone can tell me why after all these years apple has not fixed the lookupd / dns / network bugs that result in this (among other similar failures)
Message was edited by: MacMacster

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