[Dovecot] Migration from courier to dovecot

[ChandranManikandan]

Hi,
I am using Courier imap+Qmail+Vpopmail.
My IMAP having slow issues on our email client while download message as
well switch to another folder. I would request you to give me the procedure
for migration as well let me know if anything going wrong after migrate. We
have 100 mailboxes and some email box more than 25 GB. I want to access
email fast in oulook client 2010 as well squirrelmail. Kindly guide me . Am
waiting for your reply asap.

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*Thanks & Best Regards,
Manikandan.C
*