Ho lanciato da normal-user ./configure nella directory di courier-imap, dopo ho lanciato make e verso la fine della compilazione:
gcc -DHAVE_CONFIG_H -I. -I. -I. -I./.. -I.. -Wall -g -O2 -c tlspasswordcache.c
tlspasswordcache.c:9: openssl/ssl.h: No such file or directory
tlspasswordcache.c:10: openssl/err.h: No such file or directory
tlspasswordcache.c:11: openssl/rand.h: No such file or directory
make[2]: *** [tlspasswordcache.o] Error 1
make[2]: Leaving directory `/usr/local/src/courier-imap-3.0.7/tcpd'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/usr/local/src/courier-imap-3.0.7/tcpd'
make: *** [all-recursive] Error 1
Che faccio???