[Dovecot] maildir vs mdbox

Hi,

I am planning on running on test between maildir and mdbox to see which is a better fit for my use case. And I'm just looking for general advice/recommendation. I will post any results I obtain here.

Important question: I have multiple users hitting the same email account at the same time. Can be a problem with mdbox? (either via thunderbird or with custom webmail apps). I remember having huge issues with mbox a decade ago because of this. Maildir fixed this... will mdbox reintroduce this problem? This is a very important point for me.

Here is my use case:

• Ubuntu server (any specific recommandations on FS to use?)
• Standard PC hardware (core i5 or i7, few gigs of ram, hdds at first, probably ssd afterwards, nothing very fancy)
• Serving only a hand full of email accounts but some of the accounst have over 3 millions emails in them (with individual mail folders having 100k+ emails)
• Will use latest dovecot (2.1 when it comes out)
• fts-lucene or fts-solr?

-jd