[Dovecot] migrating from cyrus

[Jens Gutzeit]

Hi all,

I want to migrate our customers mailserver (400 mail accounts), from 
cyrus-2.0.16 to Dovecot. Anyone an idea how I can preserve the read/unread 
status and what can I do with the UIDL? (cyrus used a different algorithm for 
UIDL).

Thanks in advance.

Best regards,
Jens Gutzeit