On Fri, 2 Sep 2011 10:34:29 +0800 Dong Ding articulated:

Hi,

I used postfix always_bcc to backup mail. And up to now the backup account has half million mails in cur/, when I first time tried to receive the mail by outlook, it failed , no responds.

Does any one has some good idea to deal with this problem?

You have got to supply some info. The output of "dovecot -n", "postfix -n" and any log files created would be a good start. In addition, the output from "Outlook" would be invaluable. Specifying the versions of all the applications involved would be a plus also. No one here has a crystal ball, or at least I don't.

-- Jerry ✌ Dovecot.user@seibercom.net

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On 9/1/2011 10:34 PM, Dong Ding wrote:

I used postfix always_bcc to backup mail. And up to now the backup account has half million mails in cur/, when I first time tried to receive the mail by outlook, it failed , no responds.

Does any one has some good idea to deal with this problem?

If it's IMAP, you may have to try Thunderbird or some other IMAP client. But most are going to horribly die past 100k messages in a single folder (and some will die much sooner).

There's also the brute force method of moving 90% of the messages to some other temporary folder on the file system, grabbing the 50k that are left. Then moving messages back into the new/ folder in batches of 50k or so.

I'll echo Gregory's comment that you really need to setup some sort of Sieve rules to split out messages to sub-folders on-the-fly going forward.