This script builds dovecot with support for SSL. As such, you must have openssl installed - openssl-solibs is not enough in itself to meet this requirement. Additionally, dovecot will be compiled with POP3 support. Unfortunately, dovecot does not have a man page at this time, so you'll have to find your documentation elsewhere. A few examples are included in /usr/doc/dovecot-$VERSION. The dovecot team operates a wiki that may prove useful: http://wiki.dovecot.org You should create a dovecot user to run the login processes on your server. From the dovecot-new release posting comes this word of advice: Remember to read http://wiki2.dovecot.org/Upgrading/2.0 before upgrading from v1.x. Although there is automatic config conversion, it can't handle everything, so reserve some extra time for upgrading.