Prev: Rejecting Hotmail with reject=553 5.3.0 IGNORE ZonelessDate
Next: sendmail bounces
From: Andrzej Adam Filip on 22 Mar 2007 15:39
"Neil" <neil(a)JAMMConsulting.com> writes:
> I tried adding:
> define(`confBIND_OPTS', `WorkAroundBrokenAAAA')dnl
> to submit.mc as well and restarted sendmail to no avail either.

As *temporary* fix you can use FEATURE(`domaintable') with the following
entry in domaintable:

IslandSurf.com %0.

The trailing dot above *is important*.

--
[pl>en: Andrew] Andrzej Adam Filip : anfi(a)priv.onet.pl : anfi(a)xl.wp.pl
Before You Ask: http://anfi.homeunix.net/sendmail/B4UAsk-Sendmail.html
http://anfi.homeunix.net/sendmail/ [orkut,linkedin,xing]
From: Neil on 22 Mar 2007 16:40
Andrzej:

> As *temporary* fix you can use FEATURE(`domaintable') with the following
> entry in domaintable:
> IslandSurf.com %0.

I did that, but when I do the sendmail test, I still get a domain of
sender does not exist.

In case it helps, here is my sendmail.mc file:
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 Red Hat Linux')dnl
OSTYPE(`linux')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 #
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
define(`confBIND_OPTS', `WorkAroundBrokenAAAA')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 #
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
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
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(`domaintable',`hash -o /etc/mail/domaintable.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 12.) sendmail
refuses
dnl # to accept connections once it has reached its quota of child
processes.
dnl #
dnl define(`confMAX_DAEMON_CHILDREN', 12)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 #
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 #
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
INPUT_MAIL_FILTER(`clmilter',`S=local:/var/clamav/clmilter.socket,F=,
T=S:4m;R:4m')dnl
INPUT_MAIL_FILTER(`SpamMilter', `S=inet:2525(a)milter.spammilter.com,
F=T, T=S:1m;R:1m')dnl

And here is my submit.mc file:

divert(-1)
#
# Copyright (c) 2001-2003 Sendmail, Inc. and its suppliers.
# All rights reserved.
#
# By using this file, you agree to the terms and conditions set
# forth in the LICENSE file which can be found at the top level of
# the sendmail distribution.
#
#

#
# This is the prototype file for a set-group-ID sm-msp sendmail that
# acts as a initial mail submission program.
#

divert(0)dnl
include(`/usr/share/sendmail-cf/m4/cf.m4')
VERSIONID(`linux setup for Red Hat Linux')dnl
define(`confCF_VERSION', `Submit')dnl
define(`__OSTYPE__',`')dnl dirty hack to keep proto.m4 from
complaining
define(`_USE_DECNET_SYNTAX_', `1')dnl support DECnet
define(`confTIME_ZONE', `USE_TZ')dnl
define(`confDONT_INIT_GROUPS', `True')dnl
define(`confPID_FILE', `/var/run/sm-client.pid')dnl
dnl define(`confDIRECT_SUBMISSION_MODIFIERS',`C')dnl
define(`confBIND_OPTS', `WorkAroundBrokenAAAA')dnl
FEATURE(`use_ct_file')dnl
dnl
dnl If you use IPv6 only, change [127.0.0.1] to [IPv6:::1]
FEATURE(`msp', `[127.0.0.1]')dnl


From: Andrzej Adam Filip on 22 Mar 2007 17:04
"Neil" <neil(a)JAMMConsulting.com> writes:

> Andrzej:
>
>> As *temporary* fix you can use FEATURE(`domaintable') with the following
>> entry in domaintable:
>> IslandSurf.com %0.
>
> I did that, but when I do the sendmail test, I still get a domain of
> sender does not exist.
> [...]

[sorry for giving "second fresh" advices]

Another *temporary* fix to try:

LOCAL_CONFIG
CPIslandSurf.com

About permanent fix:
What type of DNS server serves the domain?

--
[pl>en: Andrew] Andrzej Adam Filip : anfi(a)priv.onet.pl : anfi(a)xl.wp.pl
Before You Ask: http://anfi.homeunix.net/sendmail/B4UAsk-Sendmail.html
http://anfi.homeunix.net/sendmail/ [orkut,linkedin,xing]
From: Per Hedeland on 22 Mar 2007 18:25
In article <1174590048.144163.104040(a)d57g2000hsg.googlegroups.com>
"Neil" <neil(a)JAMMConsulting.com> writes:
>Andrzej:
>
>> echo 'checkmail John...(a)JAMMConsulting.com' | sendmail -d8.20 -bt
>
>I have define(`confBIND_OPTS', `WorkAroundBrokenAAAA')dnl
>in my sendmail.mc file. I also checked my sendmail.cf and it has
>this:
>O ResolverOptions=WorkAroundBrokenAAAA
>
>Doing this command:
>
>echo 'checkmail K.Izer(a)IslandSurf.com' | sendmail -d8.20 -bt

>dns_getcanonname: trying IslandSurf.com. (AAAA)
> NO: errno=0, h_errno=1
>dns_getcanonname: trying IslandSurf.com.JAMMConsulting.com (AAAA)
> NO: errno=0, h_errno=1

So, this is a new form of AAAA brokenness, that sendmail doesn't have a
workaround for AFAIK: The server says that the *name* doesn't exist,
with a NXDOMAIN response - can be verified with 'dig':

$ dig aaaa IslandSurf.com @lb1.ahphosting.net
....
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 29685
;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 6, ADDITIONAL: 3

The proper response if there are no AAAA records is this:

$ dig aaaa sendmail.org @ns1.sendmail.org
....
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 42284
;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

which means "there are no AAAA records but there may be other records".
Sendmail's WorkAroundBrokenAAAA deals with another AAAA problem, where
the server gets all confused and doesn't respond at all, or responds
with a SERVFAIL or similar - this is interpreted as a temporary failure
which causes other problems.

If you have any influence on that domain, you would do them a favour by
trying to get them to fix this. If not, and you absolutely need to
communicate with them, one of Andrzej's suggestions will probably work -
another alternative is to disable AAAA lookups entirely, but this
requires recompiling sendmail without NETINET6 defined IIRC. (Actually
just building from the source tarball will do this on most OSes I
believe.)

--Per Hedeland
per(a)hedeland.org
From: Neil on 27 Mar 2007 16:44
Per:

> Sendmail's WorkAroundBrokenAAAA deals with another AAAA problem

I think we need to request sendmail to enhance their
WorkAroundBrokenAAAA processing
to include this case.

What do you think?

Thanks,
Neil

First  |  Prev  |  Next  |  Last
Pages: 1 2 3
Prev: Rejecting Hotmail with reject=553 5.3.0 IGNORE ZonelessDate
Next: sendmail bounces