I'm running fc7 (updated). I updated via yum from fc6. Oddly, Cyrus continued to work after the upgrade (it usually breaks). This time it was sendmail that broke, even though I'm running with a fairly stock system. The extent of my sendmail.mc edits are below. I get messages from sendmail saying that my client (Thunderbird on Windows Vista and FC7), well: Sep 29 19:21:59 mail sendmail[5288]: STARTTLS=server, relay=pvr.redfish-solutions.com [192.168.1.8], version=TLSv1/SSLv3, verify=NO, cipher=DHE-RSA-AES256-SHA, bits=256/256 Sep 29 19:22:23 mail sendmail[5288]: l8U1LxLB005288: pvr.redfish-solutions.com [192.168.1.8]: possible SMTP attack: command=AUTH, count=4 Sep 29 19:22:30 mail sendmail[5288]: l8U1LxLB005288: pvr.redfish-solutions.com [192.168.1.8] did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA-v4 Sep 29 19:23:05 mail sendmail[5295]: STARTTLS=server, relay=pvr.redfish-solutions.com [192.168.1.8], version=TLSv1/SSLv3, verify=NO, cipher=DHE-RSA-AES256-SHA, bits=256/256 but if I turn off TLS, it seems to work ok (using username/password authentication in the clear, I guess). Since it's TLS, I couldn't use tcpdump to read the transactions... Here are the sendmail.mc edits. Nothing too weird: --- sendmail.mc.orig 2006-09-05 07:27:48.000000000 -0600 +++ sendmail.mc 2007-03-08 21:26:38.000000000 -0700 @@ -41,7 +41,7 @@ dnl # The following allows relaying if the user authenticates, and disallows dnl # plaintext authentication (PLAIN/LOGIN) on non-TLS links dnl # -dnl define(`confAUTH_OPTIONS', `A p')dnl +define(`confAUTH_OPTIONS', `A p')dnl dnl # dnl # PLAIN is the preferred plaintext authentication method and used by dnl # Mozilla Mail and Evolution, though Outlook Express and other MUAs do @@ -49,18 +49,18 @@ dnl # guaranteed secure. dnl # Please remember that saslauthd needs to be running for AUTH. dnl # -dnl TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl -dnl define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl +TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl +define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl dnl # dnl # Rudimentary information on creating certificates for sendmail TLS: dnl # cd /usr/share/ssl/certs; make sendmail.pem dnl # Complete usage: dnl # make -C /usr/share/ssl/certs usage dnl # -dnl define(`confCACERT_PATH', `/etc/pki/tls/certs')dnl -dnl define(`confCACERT', `/etc/pki/tls/certs/ca-bundle.crt')dnl -dnl define(`confSERVER_CERT', `/etc/pki/tls/certs/sendmail.pem')dnl -dnl define(`confSERVER_KEY', `/etc/pki/tls/certs/sendmail.pem')dnl +define(`confCACERT_PATH', `/etc/pki/tls/certs')dnl +define(`confCACERT', `/etc/pki/tls/certs/ca-bundle.crt')dnl +define(`confSERVER_CERT', `/etc/pki/tls/certs/sendmail.pem')dnl +define(`confSERVER_KEY', `/etc/pki/tls/certs/sendmail.pem')dnl dnl # dnl # This allows sendmail to use a keyfile that is shared with OpenLDAP's dnl # slapd, which requires the file to be readble by group ldap @@ -71,8 +71,10 @@ dnl define(`confTO_QUEUERETURN', `5d')dnl dnl define(`confQUEUE_LA', `12')dnl dnl define(`confREFUSE_LA', `18')dnl +dnl # don't apply domain search suffixes... +define(`confBIND_OPTS', `+AAONLY -DNSRCH -DEFNAMES')dnl define(`confTO_IDENT', `0')dnl -dnl FEATURE(delay_checks)dnl +FEATURE(delay_checks)dnl FEATURE(`no_default_msa', `dnl')dnl FEATURE(`smrsh', `/usr/sbin/smrsh')dnl FEATURE(`mailertable', `hash -o /etc/mail/mailertable.db')dnl @@ -100,27 +102,35 @@ FEATURE(local_procmail, `', `procmail -t -Y -a $h -d $u')dnl FEATURE(`access_db', `hash -T<TMPF> -o /etc/mail/access.db')dnl FEATURE(`blacklist_recipients')dnl +dnl # Anti-spam features suggested from ACME.COM +FEATURE(`greet_pause', `5000')dnl +define(`confCONNECTION_RATE_WINDOW_SIZE', `60s')dnl +FEATURE(`conncontrol')dnl +FEATURE(`ratecontrol', `nodelay', `terminate')dnl +define(`confBAD_RCPT_THROTTLE', `3')dnl +define(`confMAX_RCPTS_PER_MESSAGE', `10')dnl +define(`confMAX_DAEMON_CHILDREN', `5')dnl EXPOSED_USER(`root')dnl dnl # dnl # For using Cyrus-IMAPd as POP3/IMAP server through LMTP delivery uncomment dnl # the following 2 definitions and activate below in the MAILER section the dnl # cyrusv2 mailer. dnl # -dnl define(`confLOCAL_MAILER', `cyrusv2')dnl -dnl define(`CYRUSV2_MAILER_ARGS', `FILE /var/lib/imap/socket/lmtp')dnl +define(`confLOCAL_MAILER', `cyrusv2')dnl +define(`CYRUSV2_MAILER_ARGS', `FILE /var/lib/imap/socket/lmtp')dnl dnl # dnl # The following causes sendmail to only listen on the IPv4 loopback address dnl # 127.0.0.1 and not on any other network devices. Remove the loopback dnl # address restriction to accept email from the internet or intranet. dnl # -DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl +dnl DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl dnl # dnl # The following causes sendmail to additionally listen to port 587 for dnl # mail from MUAs that authenticate. Roaming users who can't reach their dnl # preferred sendmail daemon due to port 25 being blocked or redirected find dnl # this useful. dnl # -dnl DAEMON_OPTIONS(`Port=submission, Name=MSA, M=Ea')dnl +DAEMON_OPTIONS(`Port=submission, Name=MSA, M=Ea')dnl dnl # dnl # The following causes sendmail to additionally listen to port 465, but dnl # starting immediately in TLS mode upon connecting. Port 25 or 587 followed @@ -141,18 +151,20 @@ dnl # enable both ipv6 and ipv4 in sendmail: dnl # dnl DAEMON_OPTIONS(`Name=MTA-v4, Family=inet, Name=MTA-v6, Family=inet6') +DAEMON_OPTIONS(`Name=MTA-v4, Family=inet') dnl # dnl # We strongly recommend not accepting unresolvable domains if you want to dnl # protect yourself from spam. However, the laptop and users on computers dnl # that do not have 24x7 DNS do need this. dnl # -FEATURE(`accept_unresolvable_domains')dnl +dnl FEATURE(`accept_unresolvable_domains')dnl dnl # dnl FEATURE(`relay_based_on_MX')dnl dnl # dnl # Also accept email sent to "localhost.localdomain" as local email. dnl # LOCAL_DOMAIN(`localhost.localdomain')dnl +INPUT_MAIL_FILTER(`mimdefang', `S=unix:/var/spool/MIMEDefang/mimedefang.sock, F=T, T=S:1m;R:1m;E:5m') dnl # dnl # The following example makes mail from this host and any additional dnl # specified domains appear to be sent from mydomain.com @@ -173,4 +185,4 @@ dnl MASQUERADE_DOMAIN(mydomain.lan)dnl MAILER(smtp)dnl MAILER(procmail)dnl -dnl MAILER(cyrusv2)dnl +MAILER(cyrusv2)dnl Anyone seen anything similar to this?
