on 6-9-2008 6:03 AM Ray Leventhal spake the following: > HI folks, > > I've an up-to-date CentOS 5.x box on a small intranet (<20 users). > > We did a reboot over the weekend and all appears well except that > clients on the LAN can no longer send email. Just hangs/times out. No > clear identifiers in the /var/log/maillog or /var/log/messages. > > We're not setup for ESMTP as it's a closed network and I'm really hoping > for a kickstart as to where to look to get this going. > > In case it helps, my sendmail.cf file is below. > > Thanks in advance. > -R > > divert(-1)dnl > dnl # > dnl # This is the sendmail macro config file for m4. If you make changes to > dnl # /etc/mail/sendmail.mc, you will need to regenerate the > dnl # /etc/mail/sendmail.cf file by confirming that the sendmail-cf > package is > dnl # installed and then performing a > dnl # > dnl # make -C /etc/mail > dnl # > include(`/usr/share/sendmail-cf/m4/cf.m4')dnl > VERSIONID(`setup for linux')dnl > OSTYPE(`linux')dnl > dnl # > dnl # Do not advertize sendmail version. > dnl # > dnl define(`confSMTP_LOGIN_MSG', `$j Sendmail; $b')dnl > dnl # > dnl # default logging level is 9, you might want to set it higher to > dnl # debug the configuration > dnl # > dnl define(`confLOG_LEVEL', `9')dnl > dnl # > dnl # Uncomment and edit the following line if your outgoing mail needs to > dnl # be sent out through an external mail server: > dnl # > dnl # define(`SMART_HOST', `smtp.your.provider')dnl > dnl # > define(`confDEF_USER_ID', ``8:12'')dnl > dnl define(`confAUTO_REBUILD')dnl > define(`confTO_CONNECT', `1m')dnl > define(`confTRY_NULL_MX_LIST', `True')dnl > define(`confDONT_PROBE_INTERFACES', `True')dnl > define(`PROCMAIL_MAILER_PATH', `/usr/bin/procmail')dnl > define(`ALIAS_FILE', `/etc/aliases')dnl > define(`STATUS_FILE', `/var/log/mail/statistics')dnl > define(`UUCP_MAILER_MAX', `2000000')dnl > define(`confUSERDB_SPEC', `/etc/mail/userdb.db')dnl > define(`confPRIVACY_FLAGS', `authwarnings,novrfy,noexpn,restrictqrun')dnl > define(`confAUTH_OPTIONS', `A')dnl > dnl # > 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 > dnl # > dnl # PLAIN is the preferred plaintext authentication method and used by > dnl # Mozilla Mail and Evolution, though Outlook Express and other MUAs do > dnl # use LOGIN. Other mechanisms should be used if the connection is not > 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 > 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 > 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 > dnl # > dnl define(`confDONT_BLAME_SENDMAIL', `groupreadablekeyfile')dnl > dnl # > dnl define(`confTO_QUEUEWARN', `4h')dnl > dnl define(`confTO_QUEUERETURN', `5d')dnl > dnl define(`confQUEUE_LA', `12')dnl > dnl define(`confREFUSE_LA', `18')dnl > define(`confTO_IDENT', `0')dnl > 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 > FEATURE(`virtusertable', `hash -o /etc/mail/virtusertable.db')dnl > FEATURE(redirect)dnl > FEATURE(always_add_domain)dnl > FEATURE(use_cw_file)dnl > FEATURE(use_ct_file)dnl > dnl # > dnl # The following limits the number of processes sendmail can fork to > accept > dnl # incoming messages or process its message queues to 20.) sendmail > refuses > dnl # to accept connections once it has reached its quota of child > processes. > dnl # > dnl define(`confMAX_DAEMON_CHILDREN', `20')dnl > dnl # > dnl # Limits the number of new connections per second. This caps the > overhead > dnl # incurred due to forking new sendmail processes. May be useful against > dnl # DoS attacks or barrages of spam. (As mentioned below, a per-IP > address > dnl # limit would be useful but is not available as an option at this > writing.) > dnl # > dnl define(`confCONNECTION_RATE_THROTTLE', `3')dnl > dnl # > dnl # The -t option will retry delivery if e.g. the user runs over his > quota. > dnl # > 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 > 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 > 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 # > 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 > 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 > dnl # by STARTTLS is preferred, but roaming clients using Outlook > Express can't > dnl # do STARTTLS on ports other than 25. Mozilla Mail can ONLY use > STARTTLS > dnl # and doesn't support the deprecated smtps; Evolution <1.1.1 uses smtps > dnl # when SSL is enabled-- STARTTLS support is available in version 1.1.1. > dnl # > dnl # For this to work your OpenSSL certificates must be configured. > dnl # > dnl DAEMON_OPTIONS(`Port=smtps, Name=TLSMTA, M=s')dnl > dnl # > dnl # The following causes sendmail to additionally listen on the IPv6 > loopback > dnl # device. Remove the loopback address restriction listen to the > network. > dnl # > dnl DAEMON_OPTIONS(`port=smtp,Addr=::1, Name=MTA-v6, Family=inet6')dnl > dnl # > dnl # enable both ipv6 and ipv4 in sendmail: > dnl # > dnl DAEMON_OPTIONS(`Name=MTA-v4, Family=inet, Name=MTA-v6, Family=inet6') > 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 # > 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 > dnl # > dnl # The following example makes mail from this host and any additional > dnl # specified domains appear to be sent from mydomain.com > dnl # > dnl MASQUERADE_AS(`mydomain.com')dnl > dnl # > dnl # masquerade not just the headers, but the envelope as well > dnl # > dnl FEATURE(masquerade_envelope)dnl > dnl # > dnl # masquerade not just @mydomainalias.com, but @*.mydomainalias.com > as well > dnl # > dnl FEATURE(masquerade_entire_domain)dnl > dnl # > dnl MASQUERADE_DOMAIN(localhost)dnl > dnl MASQUERADE_DOMAIN(localhost.localdomain)dnl > dnl MASQUERADE_DOMAIN(mydomainalias.com)dnl > dnl MASQUERADE_DOMAIN(mydomain.lan)dnl > MAILER(smtp)dnl > MAILER(procmail)dnl > dnl MAILER(cyrusv2)dnl > DAEMON_OPTIONS(`Name=smtp,Modifiers=b') All your Daemon_options (`port... definitions are turned off (dnl). You have effectively told sendmail to not listen to anybody. At a minimum you need "DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')" turned on for local mail to move, or "DAEMON_OPTIONS(`Port=smtp, Name=MTA')" to listen to all interfaces. -- MailScanner is like deodorant... You hope everybody uses it, and you notice quickly if they don't!!!! -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 258 bytes Desc: OpenPGP digital signature URL: <http://lists.centos.org/pipermail/centos/attachments/20080609/41ae5305/attachment-0005.sig>