Sendmail 配置文件（二）(1)

Sendmail 配置文件（二）(1)

Sendmail 配置文件如下:

FEATURE(`no_default_msa',`dnl')dnl (允许MSA被DAMEMON_OPTION覆盖的默认设置)

FEATURE(`smrsh',`/usr/sbin/smrsh')dnl (设置邮件发送器smrsh的存放路径)

FEATURE(`mailertable',`hash -o /etc/mail/mailertable.db')dnl (设置邮件发送器数据库的存放路径)

FEATURE(`virtusertable',`hash -o /etc/mail/virtusertable.db')dnl (设置虚拟邮件域数据库的存放路径)

FEATURE(redirect)dnl (支持.redirect虚拟域)

FEATURE(always_add_domain)dnl (增加主机名到所有本地发送的邮件)

FEATURE(use_cw_file)dnl (装载/etc/mail/local-host-names文件中定义的主机名)

FEATURE(use_ct_file)dnl (装载可信任用户名单)

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 (使用procmail作为本地邮件发送者)

FEATURE(`access_db',`hash -T -o /etc/mail/access.db')dnl (从/etc/mail/access.db装载可以中继的域)

FEATURE(`blacklist_recipients')dnl (根据访问数据库的值过滤外来邮件)

EXPOSED_USER(`root')dnl (禁止伪装发送者地址中出现root用户)

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(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl (指定sendmail作为MTA运行时的参数)

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 #