Cool, you got a blog article detailing how that works with Postfix/Dovecot? All clustering articles I'm seeing for those involved shared storage. Fastmail is no

Cool, you got a blog article detailing how that works with Postfix/Dovecot? All clustering articles I'm seeing for those involved shared storage. Fastmail is not very specific how that works. In any case, Exchange is not just email, it has Calendaring/Contacts stuff going on as well.