http://www.dovecot.org/
1) openssl install
download: http://www.openssl.org/source/
./config
make
make install
2) dovecot install
download: http://www.dovecot.org/download.html
CPPFLAGS="-I/usr/local/ssl/include" LDFLAGS="-L/usr/local/ssl/lib -ldl" ./configure --with-mysql --with-sql
make
make install