If you want copies of your sent mail on both computers you have to send a
copy of all outward emails to yourself. I find this is handy as well as
Bob's idea, which I have been using for some years now.


-----Original Message-----
From: WAMUG Mailing List [mailto:[EMAIL PROTECTED] On Behalf Of Robert
Howells
Sent: Thursday, 17 May 2007 12:27 PM
To: WAMUG Mailing List
Subject: Re: Mail synchronisation


On 17/05/2007, at 12:09 PM, Ronda Brown wrote:

>
> On 17/05/2007, at 12:18 AM, Severin Crisp wrote:
>
>> We have G3 iMac and a Macbook both with the same login name and  
>> password and both on OSX 10.4.9.   The Macbook was made to mirror  
>> the iMac using Migration Assistant a few days ago when originally  
>> setup.  Since then there have been Mail operations on the iMac and  
>> I want to make the Mail on the Macbook match.  If I mirror the  
>> Mail folder using Folders Synchroniser as I use for backups will  
>> it work or will I wreck Mail on the Macbook?
>> Severin Crisp
>
> Hi Severin,
>
> If your Mail Account is a POP account, doesn't look as though you can.


On a Pop account with Apple Mail - preferences-    accounts ( select  
the account )  -advanced-
you can set
" remove copy from server .... selection ... after  one month " after  
message first downloaded

which means that so long as you log the second computer on
within 1 month after the first Mac downloaded the message ,
the second Mac will receive the message .

You need to setup both Mac's with that setting .


Bob









> If it's a IMAP it is possible.
>
> From Apple Discussions:
>  <http://discussions.apple.com/thread.jspa?messageID=4374039&#4374039>
>
> "Synchronization of local mail data between computers by means of a  
> file synchronization utility is a really bad idea if more than one  
> computer is allowed to access mail between synchronizations.
>
> Mail uses a global Envelope Index file to keep track of every  
> message within the ~/Library/Mail/ folder. If this file is modified  
> on both computers between synchronizations, there is no way a file  
> synchronization utility can handle the situation properly.
>
> Another more subtle and dangerous issue is that Mail may use  
> different *.emlx sequence numbers to name the same message on  
> different computers, or worse yet, the same sequence number to name  
> different messages. The only thing a file synchronization utility  
> can do about it is create duplicates of some messages while  
> overwriting (i.e. losing) others.
>
> Mail data "synchronization" at the filesystem level can only be  
> done reliably if it's a one-way operation, i.e. if the entire  
> contents of the Mail folder on one computer are overwritten by the  
> entire contents of the Mail folder on the other. You should think  
> of the ~/Library/Mail folder as if it was a monolithic entity.
>
> BTW, this is not a Mail thing. Although the granularity may be  
> different, you would encounter similar issues with any other mail  
> client because there is no way you can avoid the same files being  
> modified differently on both computers if you use both between  
> synchronizations. The only reliable way to achieve mail  
> synchronization between computers is using an IMAP account and  
> storing mail on the server. "
>
> Cheers,
> Ronni
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