I'm configuring a mail server but sendmail doesn't let me send mails from remote devices or/and softwares. My config : CentOS 6.4, Sendmail 8.14.4.
Here's the message I get when trying to send emails from outside the server
sendmail[25390]: rA4Fp855025390: [213.x.x.x] did not issue MAIL/EXPN/VRFY/ETRN during connection to MTA
sendmail[25391]: rA4Fp86s025391: ruleset=check_rcpt, arg1=<[email protected]>, relay=[213.x.x.x], reject=550 5.7.1 <[email protected]>... Relaying denied. IP name lookup failed [213.x.x.x]
sendmail[25391]: rA4Fp86s025391: from=<[email protected]>, size=0, class=0, nrcpts=0, proto=ESMTP, daemon=MTA, relay=[213.x.x.x]
I know there's something with the relay host but what if you don't know the relay host !? I mean... Anyway, here's the sendmail.mc file
divert(-1)dnl
include(`/usr/share/sendmail-cf/m4/cf.m4')dnl
VERSIONID(`setup for linux')dnl
OSTYPE(`linux')dnl
dnl define(`confSMTP_LOGIN_MSG', `$j Sendmail; $b')dnl
dnl define(`confLOG_LEVEL', `9')dnl
dnl define(`SMART_HOST', `smtp.your.provider')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
MASQUERADE_AS(mydomain.com)dnl
MASQUERADE_DOMAIN(mydomain.com)dnl
dnl define(`confAUTH_OPTIONS', `A p')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 define(`confCACERT_PATH', `/etc/mail/certs')dnl
dnl define(`confCACERT', `/etc/mail/certs/CAcert.pem')dnl
dnl define(`confSERVER_CERT', `/etc/mail/certs/MYcert.pem')dnl
dnl define(`confSERVER_KEY', `/etc/mail/certs/MYkey.pem')dnl
dnl define(`confCLIENT_CERT', `/etc/mail/certs/MYcert.pem')dnl
dnl define(`confCLIENT_KEY', `/etc/mail/certs/MYkey.pem')dnl
dnl define(`confDONT_BLAME_SENDMAIL', `groupreadablekeyfile')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 define(`confMAX_DAEMON_CHILDREN', `20')dnl
dnl define(`confCONNECTION_RATE_THROTTLE', `3')dnl
FEATURE(`relay_hosts_only')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 define(`confLOCAL_MAILER', `cyrusv2')dnl
dnl define(`CYRUSV2_MAILER_ARGS', `FILE /var/lib/imap/socket/lmtp')dnl
dnl DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl
dnl DAEMON_OPTIONS(`Port=submission, Name=MSA, M=Ea')dnl
dnl DAEMON_OPTIONS(`Port=smtps, Name=TLSMTA, M=s')dnl
dnl DAEMON_OPTIONS(`port=smtp,Addr=::1, Name=MTA-v6, Family=inet6')dnl
dnl DAEMON_OPTIONS(`Name=MTA-v4, Family=inet, Name=MTA-v6, Family=inet6')
FEATURE(`accept_unresolvable_domains')dnl
FEATURE(masquerade_envelope)dnl
FEATURE(masquerade_entire_domain)dnl
dnl FEATURE(`relay_based_on_MX')dnl
LOCAL_DOMAIN(`mydomain.com')dnl
dnl MASQUERADE_AS(`mydomain.com')dnl
dnl FEATURE(masquerade_envelope)dnl
dnl FEATURE(masquerade_entire_domain)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
What should I do ? How do I know if SMTP-AUTH works ? TLS ?
Thank you very much for your help -.-