发送邮件到本地域忽略 MX 记录(第 2 部分)

发送邮件到本地域忽略 MX 记录(第 2 部分)

我遇到了完全相同的问题,例如在这篇文章中:发送邮件到本地域忽略 MX 记录。我还在使用 GMail For Your Domain 等电子邮件提供商(它存储和管理您的邮件)。我直接从我的服务器发送邮件,但接收邮件是通过 Yandex(电子邮件提供商)完成的。由于服务器托管一个论坛,我更喜欢直接从它发送邮件,因为使用其他邮件提供商会降低速度。此外,当我向我的订阅者发送 300,000 封电子邮件时,另一个电子邮件提供商肯定会认为我在发送垃圾邮件而阻止我。

我的 DNS 区域现在是:

;
; GSMFORUM.RU
;

$TTL 1H

gsmforum.ru. SOA ns1.hc.ru. support.hc.ru. (
               2009122268 ; Serial
               1H         ; Refresh
               30M        ; Retry
               1W         ; Expire
               1H       ) ; Minimum

gsmforum.ru.          NS      ns1.hc.ru.
gsmforum.ru.          NS      ns2.hc.ru.
@                     A       79.174.68.223
*.gsmforum.ru.        CNAME   @
ns1                   A       79.174.68.223
ns2                   A       79.174.68.224
@                     MX      10 mx.yandex.ru.
mail                  CNAME   domain.mail.yandex.net.
yamail-xxxxxxxxx      CNAME   mail.yandex.ru.

服务器主机名是 server.gsmforum.ru。可能是这个原因吗?有人能解释一下这个问题的原因吗(使 sendmail 认为域是本地的规则)?我可以轻松更改

*.gsmforum.ru.        CNAME   @

进入

*.gsmforum.ru.        A   79.174.68.224

解决这个问题?

[root@server ~]# cat /etc/mail/local-host-names
localhost
localhost.localdomain

该服务器托管 gsmforum.ru,因此我无法像 David Mackintosh 建议的那样将其放入另一个域中。将域放入 mailertable 中也无法解决问题:sendmail -bt 仍然显示该地址是本地的。在 sendmail 配置中,DontProbeInterfaces 也设置为 true。

M4文件如下:

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')
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(`Name=MTA,Port=smtp')
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
FEATURE(`dnsbl',`zen.spamhaus.org',`Rejected - your IP is blacklisted by http://www.spamhaus.org')

答案1

我禁用本地传送的操作如下。我将使用 example.com 域。

要求:

  • example.com 指向分配给其中一个以太网接口的 IP 地址的条目。
  • /etc/hosts 定义 example.com,分配给与上面相同的 IP 地址
  • 指向 Google 服务器的 example.com MX 记录(ASPMX.L.GOOGLE.COM 等)
  • 默认 sendmail 安装(我在 Ubuntu 上)

脚步:

vim /etc/mail/sendmail.mc

在最后:

define(`MAIL_HUB', `example.com.')dnl
define(`LOCAL_RELAY', `example.com.')dnl

进而:

sendmailconfig
service sendmail restart

测试:

echo -e "To: [email protected]\nSubject: Test\nTest\n" | sendmail -bm -t -v
echo -e "To: user\nSubject: Test\nTest\n" | sendmail -bm -t -v

您应该会看到它连接到谷歌服务器,然后您应该会看到您的邮件被发送到您的谷歌收件箱。

答案2

以防万一有人遇到这个问题。

首先,感谢 sporker 和 Pawel 为我指明了正确的方向来解决这个问题。

我最初的问题是 sendmail 将我的域 example.com 电子邮件帐户视为本地帐户。

这些链接非常有用: 发送邮件到本地域忽略 MX 记录(第 2 部分) http://lists.freebsd.org/pipermail/freebsd-questions/2004-September/057382.html http://objectmix.com/sendmail/367920-sendmail-ignores-mailertable-some-semilocal-domains.html

但就我使用 FreeBSD 8.2 的情况而言,真正起作用的是:

# cd /etc/mail

# vim freebsd.mc

添加以下两行:

define(邮件中心',example.com.')dnl

define(本地中继',example.com.')dnl

就在之前:

MAILER(local)

MAILER(smtp)

# make

--- 这是输出 ---

 cp freebsd.mc host.example.com.mc
 /usr/bin/m4 -D_CF_DIR_=/usr/share/sendmail/cf/   /usr/share/sendmail/cf/m4/cf.m4 host.example.com.mc > host.example.com.cf
 cp freebsd.submit.mc host.example.com.submit.mc
 /usr/bin/m4 -D_CF_DIR_=/usr/share/sendmail/cf/   /usr/share/sendmail/cf/m4/cf.m4 host.example.com.submit.mc > host.example.com.submit.cf

--- 输出结束 ---

# cp sendmail.cf sendmail.cf.bak

# cp host.example.com.cf sendmail.cf

# /etc/rc.d/sendmail restart

希望这可以为某些人省去一些麻烦。

相关内容