This indicates that there is a cyrus-sasl2 package, but it doesn't appear to be available in the repositories?
cyrus-sasl2
I need to install Cyrus SASL for use with postfix, not the Cyrus IMAP server.
How do I install cyrus-sasl on a 10.04 Server?
That's actually a list of packages. Try this:
sudo apt-get install sasl2-bin