On Tue, 2008-02-05 at 10:01 +0100, Tobias Balle-Petersen wrote: > I'm setting up dovecot (IMAP only) at an ad-agency (Lots of big files > attached to mails). I'm > wondering... What would you consider to be reasonable mail quota? My concern > is, that some > client-software will have problems with huge mailboxes. I was going to give > everyone 2GB, but some > users demand 15GB+. Does dovecot "prefer" mailboxes within a certain size?
As Johannes said, the mailbox size doesn't really matter to Dovecot, only the number of messages (except for operations such as server-side search). It's also possible to specify a message number quota, but since users can have multiple mailboxes it's less of a problem if users have ten 10k message mailboxes than one 100k message mailbox. Anyway, Dovecot should be able to handle tens of thousands of messages in a single mailbox easily. I've been testing it with a 350k message mailbox once in a while. With ext3 it takes maybe 20 seconds to initially read the directory into cache, and after that for each sync (new message, flag change, expunge, etc) it takes about 2 seconds to sync. v1.1's dbox format doesn't need this syncing and all operations are pretty much instant. I don't know about clients though.
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