[CentOS] Converting to maildir

Yup, Cyrus was rock solid for us for years with Thunderbird as the 
client. We were forced into an Exchange replacement (Scalix) and now 
Google mail because 'Thunderbird is clunky (read: follows all of the 
user interface guidelines) and Outlook is cool (read: actually forces 
overrides on windows standard interface behaviour)' and neither backend 
is solid. Don't get me started on the huge list of LookOUT! WTFs. I 
wouldn't trust it for e-mails with my mum. GMail sometimes randomly 
expunges e-mails because it feels like it. Sometimes when you're 
actually reading the thing. You can't e-mail yourself.