One nice feature of cyrus IMAP is that it does support quotas. Quotas are applied on the basis of the mailbox and any sub-mailboxes that do not have quotas. This means that a mailbox can only have or be a part of one quota. When mail arrives the quota is checked to verify that the mail will not cause the quota to be exceeded, THE MAIL WILL STILL BE DELEVERED; however, the user will be notified  they are over the limit. If the mailbox is already over the ...

The Cyrus IMAP server has a program that is in the cyrus-utils that provides a way to administer the system.   The rpm for cyrus-utils should be installed when the server is installed.  The utils are an important part of the program management. Command                                   ...

The default admin user is cyrus; however, an additional admin may be needed, or for some reason the default does not work a new admin can be created. Create an admin user name on the system with a password first.  cyrus is the default and will be created when cyrus IMAP is installed. However, a good password must be created, see the example. # passwd cyrus Changing password for user cyrus. New UNIX password: BAD PASSWORD: it is based on a ...

Create Users Create the users on the system. Create users with the false option so they cannot log into the server. This is an added security feature. A. Create the User useradd sue -s /bin/false passwd sue A common mistake is to forget to provide passwords for these users. B. Use saslpasswd2 to create a cyrus account for the ...

Basic Installation Install the two basic applications required, cyrus-imapd and cyrus-imapd-utils. You can either use the graphical tools to install or from the command line: yum install cyrus-imapd cyrus-imapd-utils (CentOS) apt-get install cyrus-imapd cyrus-impad-utils (Ubuntu) Start cyrus-imapd # service cyrus-imapd start Starting cyrus-imapd: preparing databases... done.         [  OK  ] (Suse and Ubuntu) /etc/init.d/cyrus-imapd ...