我对 sendmail 完全是个新手，现在我安装了 sendmail，对其进行了配置（据我所知）添加了本地主机名，添加了访问条目，添加了 virtuser 条目，在 iptables 中打开了端口 25。
我的 DNS 指向我的服务器！
现在，当我从互联网上的另一个位置连接并使用 telnet server.com 25 并使用手动 SMTP 命令（HELO、MAIL From 等）时，邮件就会发送并到达正确的用户。但当我使用另一个客户端并且它被（例如谷歌）中继时，我会收到此错误：
拒绝中继。需要进行正确的身份验证。（状态 14）。
我忘记了什么设置？我需要发布任何配置文件以便您能帮助我吗？我使用 CentOS 5.5 和最新的 sendmail rpm
本地主机名：
localhost
localhost.localdomain
footballmatcher.com
使用权：
Connect:localhost.localdomain RELAY
Connect:localhost RELAY
Connect:127.0.0.1 RELAY
footballmatcher.com OK
domaintable = 空 mailertable = 空 trustusers = 空 virtusertable = 空
sendmail.mc（从 webmin 中提取，因此第一行单词不是真实的）
Entry type Line in configuration file Move
Other divert(-1)dnl
Other dnl #
Other dnl # This is the sendmail macro config file for m4. If you make changes to
Other dnl # /etc/mail/sendmail.mc, you will need to regenerate the
Other dnl # /etc/mail/sendmail.cf file by confirming that the sendmail-cf package is
Other dnl # installed and then performing a
Other dnl #
Other dnl # make -C /etc/mail
Other dnl #
Other include(`/usr/share/sendmail-cf/m4/cf.m4')dnl
Other VERSIONID(`setup for linux')dnl
OS Type OSTYPE(`linux')dnl
Other dnl #
Other dnl # Do not advertize sendmail version.
Other dnl #
Other dnl define(`confSMTP_LOGIN_MSG', `$j Sendmail; $b')dnl
Other dnl #
Other dnl # default logging level is 9, you might want to set it higher to
Other dnl # debug the configuration
Other dnl #
Other dnl define(`confLOG_LEVEL', `9')dnl
Other dnl #
Other dnl # Uncomment and edit the following line if your outgoing mail needs to
Other dnl # be sent out through an external mail server:
Other dnl #
Other dnl define(`SMART_HOST', `smtp.your.provider')dnl
Other dnl #
Define define(`confDEF_USER_ID', ``8:12'')dnl
Other dnl define(`confAUTO_REBUILD')dnl
Define define(`confTO_CONNECT', `1m')dnl
Define define(`confTRY_NULL_MX_LIST', `True')dnl
Define define(`confDONT_PROBE_INTERFACES', `True')dnl
Define define(`PROCMAIL_MAILER_PATH', `/usr/bin/procmail')dnl
Define define(`ALIAS_FILE', `/etc/aliases')dnl
Define define(`STATUS_FILE', `/var/log/mail/statistics')dnl
Define define(`UUCP_MAILER_MAX', `2000000')dnl
Define define(`confUSERDB_SPEC', `/etc/mail/userdb.db')dnl
Define define(`confPRIVACY_FLAGS', `authwarnings,novrfy,noexpn,restrictqrun')dnl
Define define(`confAUTH_OPTIONS',`A')
Other dnl #
Other dnl # The following allows relaying if the user authenticates, and disallows
Other dnl # plaintext authentication (PLAIN/LOGIN) on non-TLS links
Other dnl #
Other dnl #
Other dnl # PLAIN is the preferred plaintext authentication method and used by
Other dnl # Mozilla Mail and Evolution, though Outlook Express and other MUAs do
Other dnl # use LOGIN. Other mechanisms should be used if the connection is not
Other dnl # guaranteed secure.
Other dnl # Please remember that saslauthd needs to be running for AUTH.
Other dnl #
Other TRUST_AUTH_MECH(`LOGIN PLAIN')dnl
Define define(`confAUTH_MECHANISMS',`LOGIN PLAIN')
Other dnl #
Other dnl # Rudimentary information on creating certificates for sendmail TLS:
Other dnl # cd /etc/pki/tls/certs; make sendmail.pem
Other dnl # Complete usage:
Other dnl # make -C /etc/pki/tls/certs usage
Other dnl #
Other dnl define(`confCACERT_PATH', `/etc/pki/tls/certs')dnl
Other dnl define(`confCACERT', `/etc/pki/tls/certs/ca-bundle.crt')dnl
Other dnl define(`confSERVER_CERT', `/etc/pki/tls/certs/sendmail.pem')dnl
Other dnl define(`confSERVER_KEY', `/etc/pki/tls/certs/sendmail.pem')dnl
Other dnl #
Other dnl # This allows sendmail to use a keyfile that is shared with OpenLDAP's
Other dnl # slapd, which requires the file to be readble by group ldap
Other dnl #
Other dnl define(`confDONT_BLAME_SENDMAIL', `groupreadablekeyfile')dnl
Other dnl #
Other dnl define(`confTO_QUEUEWARN', `4h')dnl
Other dnl define(`confTO_QUEUERETURN', `5d')dnl
Other dnl define(`confQUEUE_LA', `12')dnl
Other dnl define(`confREFUSE_LA', `18')dnl
Define define(`confTO_IDENT', `0')dnl
Other dnl FEATURE(delay_checks)dnl
Feature FEATURE(`no_default_msa', `dnl')dnl
Feature FEATURE(`smrsh', `/usr/sbin/smrsh')dnl
Feature FEATURE(`mailertable', `hash -o /etc/mail/mailertable.db')dnl
Feature FEATURE(`virtusertable', `hash -o /etc/mail/virtusertable.db')dnl
Feature FEATURE(redirect)dnl
Feature FEATURE(always_add_domain)dnl
Feature FEATURE(use_cw_file)dnl
Feature FEATURE(use_ct_file)dnl
Other dnl #
Other dnl # The following limits the number of processes sendmail can fork to accept
Other dnl # incoming messages or process its message queues to 20.) sendmail refuses
Other dnl # to accept connections once it has reached its quota of child processes.
Other dnl #
Other dnl define(`confMAX_DAEMON_CHILDREN', `20')dnl
Other dnl #
Other dnl # Limits the number of new connections per second. This caps the overhead
Other dnl # incurred due to forking new sendmail processes. May be useful against
Other dnl # DoS attacks or barrages of spam. (As mentioned below, a per-IP address
Other dnl # limit would be useful but is not available as an option at this writing.)
Other dnl #
Other dnl define(`confCONNECTION_RATE_THROTTLE', `3')dnl
Other dnl #
Other dnl # The -t option will retry delivery if e.g. the user runs over his quota.
Other dnl #
Feature FEATURE(local_procmail, `', `procmail -t -Y -a $h -d $u')dnl
Feature FEATURE(`access_db', `hash -T<TMPF> -o /etc/mail/access.db')dnl
Feature FEATURE(`blacklist_recipients')dnl
Other EXPOSED_USER(`root')dnl
Other dnl #
Other dnl # For using Cyrus-IMAPd as POP3/IMAP server through LMTP delivery uncomment
Other dnl # the following 2 definitions and activate below in the MAILER section the
Other dnl # cyrusv2 mailer.
Other dnl #
Other dnl define(`confLOCAL_MAILER', `cyrusv2')dnl
Other dnl define(`CYRUSV2_MAILER_ARGS', `FILE /var/lib/imap/socket/lmtp')dnl
Other dnl #
Other dnl # The following causes sendmail to only listen on the IPv4 loopback address
Other dnl # 127.0.0.1 and not on any other network devices. Remove the loopback
Other dnl # address restriction to accept email from the internet or intranet.
Other dnl #
Other DAEMON_OPTIONS(`Port=smtp,Name=MTA')dnl
Other dnl #
Other dnl # The following causes sendmail to additionally listen to port 587 for
Other dnl # mail from MUAs that authenticate. Roaming users who can't reach their
Other dnl # preferred sendmail daemon due to port 25 being blocked or redirected find
Other dnl # this useful.
Other dnl #
Other dnl DAEMON_OPTIONS(`Port=submission, Name=MSA, M=Ea')dnl
Other dnl #
Other dnl # The following causes sendmail to additionally listen to port 465, but
Other dnl # starting immediately in TLS mode upon connecting. Port 25 or 587 followed
Other dnl # by STARTTLS is preferred, but roaming clients using Outlook Express can't
Other dnl # do STARTTLS on ports other than 25. Mozilla Mail can ONLY use STARTTLS
Other dnl # and doesn't support the deprecated smtps; Evolution <1.1.1 uses smtps
Other dnl # when SSL is enabled-- STARTTLS support is available in version 1.1.1.
Other dnl #
Other dnl # For this to work your OpenSSL certificates must be configured.
Other dnl #
Other dnl DAEMON_OPTIONS(`Port=smtps, Name=TLSMTA, M=s')dnl
Other dnl #
Other dnl # The following causes sendmail to additionally listen on the IPv6 loopback
Other dnl # device. Remove the loopback address restriction listen to the network.
Other dnl #
Other dnl DAEMON_OPTIONS(`port=smtp,Addr=::1, Name=MTA-v6, Family=inet6')dnl
Other dnl #
Other dnl # enable both ipv6 and ipv4 in sendmail:
Other dnl #
Other dnl DAEMON_OPTIONS(`Name=MTA-v4, Family=inet, Name=MTA-v6, Family=inet6')
Other dnl #
Other dnl # We strongly recommend not accepting unresolvable domains if you want to
Other dnl # protect yourself from spam. However, the laptop and users on computers
Other dnl # that do not have 24x7 DNS do need this.
Other dnl #
Feature FEATURE(`accept_unresolvable_domains')dnl
Other dnl #
Other dnl FEATURE(`relay_based_on_MX')dnl
Other dnl #
Other dnl # Also accept email sent to "localhost.localdomain" as local email.
Other dnl #
Other LOCAL_DOMAIN(`localhost.localdomain')dnl
Other dnl #
Other dnl # The following example makes mail from this host and any additional
Other dnl # specified domains appear to be sent from mydomain.com
Other dnl #
Other dnl MASQUERADE_AS(`mydomain.com')dnl
Other dnl #
Other dnl # masquerade not just the headers, but the envelope as well
Other dnl #
Other dnl FEATURE(masquerade_envelope)dnl
Other dnl #
Other dnl # masquerade not just @mydomainalias.com, but @*.mydomainalias.com as well
Other dnl #
Other dnl FEATURE(masquerade_entire_domain)dnl
Other dnl #
Other dnl MASQUERADE_DOMAIN(localhost)dnl
Other dnl MASQUERADE_DOMAIN(localhost.localdomain)dnl
Other dnl MASQUERADE_DOMAIN(mydomainalias.com)dnl
Other dnl MASQUERADE_DOMAIN(mydomain.lan)dnl
Mailer MAILER(smtp)dnl
Mailer MAILER(procmail)dnl
Other dnl MAILER(cyrusv2)dnl
答案1
根据您的 sendmail.mc，您的 sendmail 设置支持 SMTP 身份验证和 STARTTLS。当您在端口 25 上“手动”（telnet）连接时，您未使用任何这些选项。但是，您的客户端似乎设置为连接到您的 sendmail 服务器并使用 SMTP 身份验证或 STARTTLS（或两者），并且您的服务器虽然声称支持这些选项，但配置不正确。
让您的客户端连接到服务器的端口 25，并取消选中启用 STARTTLS、SSL、TLS 或 SMTP-AUTH 的任何选项。您的另一个选择是在阅读sendmail 文档。
答案2
使用 SMTP 授权（本地登录名和密码）：
AUTH PLAIN base64("\000email\000password")
或者在 /etc/mail/access 中接受中继你的 IP
192.168.1.1 RELAY
然后创建映射“makemap hash /etc/mail/access.db < /etc/mail/access”