
Also roundcube as a Frontend is much faster when going through severel houndred of thousands of mails. The Server can handle those Mails a lot better than Apple Mail. In our company we have a Linux Mail-Server and a Roundcube Frontend with a MySQL DB. I use a OS X (Mail-) Server with a Roundcube Frontend and a MySQL Database. Having your own Server for that helps a lot. Don't go beyond 10k Mails (in your main Postbox).

It is not recommended having such a big MailBox at all. In effect, your Hard-Drive storage and the Performance of your Mac are the only limiting factors, not some count of messages in terms of size or number.Īs you already noticed, the app gets really slow with Mails over 100k or even 200k on current hardware (perhaps except the Mac Pro). The Limit is not something programmed into Mail.
