530 authentication required

Posted on 2008-11-05
Last Modified: 2013-12-18
Hi -

I've searched around for a solution to my problem for a very long time now.  I found a lot written about it and I've tried many of the suggestions but still no luck.  Any help would be welcome.  Thanks in advance!

I've included the following below:

CentOS 5
Sendmail 8.13.8
=== bounced mail ===
=== maillog ===
=== hosts ===
=== access ===
=== authinfo ===
=== ===

The "bounced mail" file shows the authentication problem, although
there's also a troubling "DSN: Service unavailable" message that
appears in "maillog".  I'm not sure whether the two are related or if
the latter is really a problem at all.


CentOS 5
Sendmail 8.13.8

=== bounced mail ===
From  Sun Nov  2 11:53:57 2008
Return-Path: <>
Received: from localhost (localhost)
        by (8.13.8/8.13.8) id mA2Gru4B002917;
        Sun, 2 Nov 2008 11:53:56 -0500
Date: Sun, 2 Nov 2008 11:53:56 -0500
From: Mail Delivery Subsystem <>
Message-Id: <>
To: <>
MIME-Version: 1.0
Content-Type: multipart/report; report-type=delivery-status;
Subject: Returned mail: see transcript for details
Auto-Submitted: auto-generated (failure)

This is a MIME-encapsulated message


The original message was received at Sun, 2 Nov 2008 11:53:56 -0500
from []

   ----- The following addresses had permanent fatal errors -----
    (reason: 530 authentication required - for help go to

   ----- Transcript of session follows -----
... while talking to
>>> MAIL From:<>

<<< 530 authentication required - for help go to
554 5.0.0 Service unavailable

Content-Type: message/delivery-status

Reporting-MTA: dns;
Received-From-MTA: DNS;
Arrival-Date: Sun, 2 Nov 2008 11:53:56 -0500

Final-Recipient: RFC822;
Action: failed
Status: 5.0.0
Diagnostic-Code: SMTP; 530 authentication required - for help go to
Last-Attempt-Date: Sun, 2 Nov 2008 11:53:56 -0500

Content-Type: message/rfc822

Return-Path: <>
Received: from ( [])
        by (8.13.8/8.13.8) with ESMTP id mA2Gru4B002915
        for <>; Sun, 2 Nov 2008 11:53:56 -0500
Received: (from root@localhost)
        by (8.13.8/8.13.8/Submit) id mA2GrtoD002914;
        Sun, 2 Nov 2008 11:53:55 -0500
Date: Sun, 2 Nov 2008 11:53:55 -0500
From: root <>
Message-Id: <>
Subject: I'm sending mail from the Terminal!


=== maillog ===
Nov  2 11:49:35 pbx sendmail[2421]: alias database /etc/aliases
rebuilt by root
Nov  2 11:49:35 pbx sendmail[2421]: /etc/aliases: 76 aliases, longest
10 bytes, 765 bytes total
Nov  2 11:49:35 pbx sendmail[2426]: starting daemon (8.13.8): SMTP
Nov  2 11:49:35 pbx sm-msp-queue[2434]: starting daemon (8.13.8):
Nov  2 11:53:56 pbx sendmail[2914]: mA2GrtoD002914: from=root,
size=71, class=0, nrcpts=1,
msgid=<>, relay=root@localhost
Nov  2 11:53:56 pbx sendmail[2915]: mA2Gru4B002915:
from=<>, size=318, class=0, nrcpts=1,
msgid=<>, proto=ESMTP,
daemon=MTA, []
Nov  2 11:53:56 pbx sendmail[2914]: mA2GrtoD002914:, ctladdr=root (0/0), delay=00:00:01,
xdelay=00:00:00, mailer=relay, pri=30071, relay=[]
[], dsn=2.0.0, stat=Sent (mA2Gru4B002915 Message accepted for
Nov  2 11:53:56 pbx sendmail[2917]: mA2Gru4B002915:
to=<>, ctladdr=<> (0/0),
delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=120318, relay=smtp- [], dsn=5.0.0, stat=Service
Nov  2 11:53:56 pbx sendmail[2917]: mA2Gru4B002915: mA2Gru4B002917:
DSN: Service unavailable
Nov  2 11:53:57 pbx sendmail[2917]: mA2Gru4B002917:
to=<>, delay=00:00:01, xdelay=00:00:01, mailer=local,
pri=31546, dsn=2.0.0, stat=Sent

=== hosts ===
# Do not remove the following line, or various programs
# that require network functionality will fail. pbx.local pbx localhost.localdomain localhost
::1             localhost6.localdomain6 localhost6

=== access ===
# Check the /usr/share/doc/sendmail/ file for a description
# of the format of this file. (search for access_db in that file)
# The /usr/share/doc/sendmail/ is part of the sendmail-doc
# package.
# by default we allow relaying from localhost...
Connect:localhost.localdomain           RELAY
Connect:localhost                       RELAY
Connect:                       RELAY
Connect:                   RELAY

=== authinfo ===
============= "U:root" "I:<me>" "P:<my
password>" "M:LOGIN PLAIN"

=== ===
dnl #
dnl # This is the sendmail macro config file for m4. If you make
changes to
dnl # /etc/mail/, you will need to regenerate the
dnl # /etc/mail/ file by confirming that the sendmail-cf
package is
dnl # installed and then performing a
dnl #
dnl #     make -C /etc/mail
dnl #
VERSIONID(`setup for 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 #
define(`SMART_HOST', `[]')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(`confAUTH_OPTIONS', `A')dnl
dnl #
dnl # The following allows relaying if the user authenticates, and
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
dnl # Mozilla Mail and Evolution, though Outlook Express and other
MUAs do
dnl # use LOGIN. Other mechanisms should be used if the connection is
dnl # guaranteed secure.
dnl # Please remember that saslauthd needs to be running for AUTH.
dnl #
dnl #
dnl # Rudimentary information on creating certificates for sendmail
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
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
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
dnl # to accept connections once it has reached its quota of child
dnl #
dnl define(`confMAX_DAEMON_CHILDREN', `20')dnl
dnl #
dnl # Limits the number of new connections per second. This caps the
dnl # incurred due to forking new sendmail processes. May be useful
dnl # DoS attacks or barrages of spam. (As mentioned below, a per-IP
dnl # limit would be useful but is not available as an option at this
dnl #
dnl define(`confCONNECTION_RATE_THROTTLE', `3')dnl
dnl #
dnl # The -t option will retry delivery if e.g. the user runs over his
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(`authinfo', `hash -o /etc/mail/authinfo.db')dnl
dnl #
dnl # For using Cyrus-IMAPd as POP3/IMAP server through LMTP delivery
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 # and not on any other network devices. Remove the
dnl # address restriction to accept email from the internet or
dnl #
DAEMON_OPTIONS(`Port=smtp,Addr=, Name=MTA')dnl
dnl #
dnl # The following causes sendmail to additionally listen to port 587
dnl # mail from MUAs that authenticate. Roaming users who can't reach
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
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
dnl # and doesn't support the deprecated smtps; Evolution <1.1.1 uses
dnl # when SSL is enabled-- STARTTLS support is available in version
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
dnl # device. Remove the loopback address restriction listen to the
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,
dnl #
dnl # We strongly recommend not accepting unresolvable domains if you
want to
dnl # protect yourself from spam. However, the laptop and users on
dnl # that do not have 24x7 DNS do need this.
dnl #
dnl #
dnl FEATURE(`relay_based_on_MX')dnl
dnl #
dnl # Also accept email sent to "localhost.localdomain" as local
dnl #
dnl #
dnl # The following example makes mail from this host and any
dnl # specified domains appear to be sent from
dnl #
dnl #
dnl # masquerade not just the headers, but the envelope as well
dnl #
dnl #
dnl # masquerade not just, but @*
as well
dnl #
dnl FEATURE(masquerade_entire_domain)dnl
dnl #
dnl MASQUERADE_DOMAIN(localhost)dnl
dnl MASQUERADE_DOMAIN(localhost.localdomain)dnl
dnl MASQUERADE_DOMAIN(mydomain.lan)dnl
dnl MAILER(cyrusv2)dnla
Question by:rapperyo
    1 Comment

    Accepted Solution

    Fixed thanks to Tilman's post on comp.mail.sendmail.

    I had in authinfo, the same as what I had for SMART_HOST in but I had to change authinfo to
    I wasn't worried about this at first because a "dig" on shows that it resolves to (Rogers uses Yahoo's infrastructure) so as far as I was concerned it was the same thing.  In fact sendmail ends up trying to deliver the mail to the right place, but beacuse cannot be found in authinfo, the credentials cannot be found.

    Hope this helps someone else!


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