Setting Up of IMAP Server

[prasanna]

Hi,

	I setting up a Mail server for my company.  I have installed Postfix, it is working fine.  I am confused to choose a IMAP server. Some of my requirements are

    1) Users are created using /etc/passwd, No Mysql or LDAP at present. 
    2) User should be given quota for their INBOX, selected users should 
    have unlimited or variable quota
    3) Quota exceeded users mails should be stored somewhere other than 
    their inbox, on request from the user should be delivered to them by 
    increasing their quota for time being.
    4) Web based Management of User. 
    5) Backup option of user mailbox  should be available. 
    Do all my requirement can be met by cyrus imap server??  
If yes, can you provide me the links to met the above requirements


Regards,
P. Prasanna


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