hi, i have installed sendmail+mailscanner+clamav+spamassassin and work fine, but my telnet localhost 25 is not authenticates. i read a lot of docs but something i don't do it. i have installed centos 4.3 with: sendmail-8.13.1-3 sendmail-cf-8.13.1-3 dovecot-0.99.11-2 mailscanner-4.50.15-3.9 clamav-0.88.4-1.9 spamassassin-3.0.6-1 cyrus-sasl-2.1.19-5 cyrus-sasl-plain-2.1.19-5 cyrus-sasl-md5-2.1.19-5 and i have enabled the next config: TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN') DAEMON_OPTIONS(`Port=smtp, Name=MTA')dnl i try the next: /usr/lib/sasl2/Sendmail.conf pwcheck_method:shadow /etc/ld.so.conf /usr/lib/sasl2 i think than this is my problem, i don't know where i put this lines: # SASL2 (smtp authentication) APPENDDEF(`confENVDEF', `-DSASL=2') APPENDDEF(`conf_sendmail_LIBS', `-lsasl2') because, the file site.config.m4 that'snt exist in centos 4. i'm lost. any comments or light in the darkness is welcome, if just i block the access without login to telnet....i will so happy. thanks Roberto.-