email server upgrade

Our main mail email server has been upgraded:

  1. Linux distribution was upgraded from rom Debian Squeeze (Debian 6.0.7) to Debian Wheezy (Debian 7.0). This means:
    • new libc, kernel
    • new postfix, courier POP and Courier IMAP daemons
    • new bind daemon
    • new ssh daemon
  2. We used this upgrade as an opportunity to migrate the email domains and users database to the new database server; and
  3. We uninstalled all databases form the email server (freeing up RAM, disk and CPU resources in the process).

Overall we are very happy with the result.

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