Email
郵件標頭“發件人”域自動替換為伺服器域，為什麼？
發送到我們公司伺服器的任何郵件的郵件標頭“發件人”域都將替換為伺服器域。
例如：
example@gmail.com 向我們的伺服器（company.com）發送電子郵件。我們看到這封電子郵件的發件人是 example@company.com。
我不知道原因。請幫我。謝謝！
郵件系統：sendmail + dovecot + saslauthd
sendmail.mc:
#----------------------------------------------------------------------------- # $Sendmail: debproto.mc,v 8.14.3 2010-08-03 06:56:05 cowboy Exp $ # # Copyright (c) 1998-2009 Richard Nelson. All Rights Reserved. # # cf/debian/sendmail.mc. Generated from sendmail.mc.in by configure. # # sendmail.mc prototype config file for building Sendmail 8.14.3 # # Note: the .in file supports 8.7.6 - 9.0.0, but the generated # file is customized to the version noted above. # # This file is used to configure Sendmail for use with Debian systems. # # If you modify this file, you will have to regenerate /etc/mail/sendmail.cf # by running this file through the m4 preprocessor via one of the following: # * make (or make -C /etc/mail) # * sendmailconfig # * m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf # The first two options are preferred as they will also update other files # that depend upon the contents of this file. # # The best documentation for this .mc file is: # /usr/share/doc/sendmail-doc/cf.README.gz # #----------------------------------------------------------------------------- divert(0)dnl # # Copyright (c) 1998-2005 Richard Nelson. All Rights Reserved. # # This file is used to configure Sendmail for use with Debian systems. # define(`_USE_ETC_MAIL_')dnl include(`/usr/share/sendmail/cf/m4/cf.m4')dnl include(`/etc/mail/sasl/sasl.m4')dnl VERSIONID(`$Id: sendmail.mc, v 8.14.3-9.2ubuntu1 2010-08-03 06:56:05 cowboy Exp $') OSTYPE(`debian')dnl DOMAIN(`debian-mta')dnl dnl # Items controlled by /etc/mail/sendmail.conf - DO NOT TOUCH HERE undefine(`confHOST_STATUS_DIRECTORY')dnl #DAEMON_HOSTSTATS= dnl # dnl # General defines dnl # dnl # SAFE_FILE_ENV: [undefined] If set, sendmail will do a chroot() dnl # into this directory before writing files. dnl # If *all* your user accounts are under /home then use that dnl # instead - it will prevent any writes outside of /home ! dnl # define(`confSAFE_FILE_ENV', `')dnl dnl # dnl # Daemon options - restrict to servicing LOCALHOST ONLY !!! dnl # Remove `, Addr=' clauses to receive from any interface dnl # If you want to support IPv6, switch the commented/uncommentd lines dnl # FEATURE(`no_default_msa')dnl TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl dnl define(`confAUTH_OPTIONS', `A') dnl define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl dnl DAEMON_OPTIONS(`Family=inet6, Name=MTA-v6, Port=smtp, Addr=::1')dnl DAEMON_OPTIONS(`Family=inet, Name=MTA-v4, Port=smtp, Addr=0.0.0.0')dnl dnl DAEMON_OPTIONS(`Family=inet6, Name=MSP-v6, Port=submission, M=Ea, Addr=::1')dnl DAEMON_OPTIONS(`Family=inet, Name=MSP-v4, Port=submission, M=Ea Addr=0.0.0.0')dnl dnl DAEMON_OPTIONS(`Family=inet, Name=MSP, Port=25 M=Ea')dnl define(`confDEF_USER_ID',``mail:mail'')dnl undefine(`UUCP_RELAY')dnl undefine(`BITNET_RELAY')dnl define(`confRUN_AS_USER',`root:smmsp')dnl define(`confTRUSTED_USER', `smmsp')dnl define(`confTRUSTED_USER', `smmta')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', `/etc/mail/statistics')dnl define(`UUCP_MAILER_MAX', `5000000')dnl define(`confPRIVACY_FLAGS', `authwarnings,novrfy,noexpn,restrictqrun')dnl dnl #define(QUEUE_DIR,`/var/spool/mqueue/q*')dnl define(`confMAX_MESSAGE_SIZE',`40000000')dnl dnl # added for dns problem defer define(`confBIND_OPTS', `WorkAroundBrokenAAAA')dnl dnl # dnl # Be somewhat anal in what we allow define(`confPRIVACY_FLAGS',dnl `needmailhelo,needexpnhelo,needvrfyhelo,restrictqrun,restrictexpand,nobodyreturn,authwarnings')dnl dnl # dnl # Define connection throttling and window length define(`confCONNECTION_RATE_THROTTLE', `15')dnl define(`confCONNECTION_RATE_WINDOW_SIZE',`10m')dnl dnl # dnl # Features dnl # dnl # use /etc/mail/local-host-names FEATURE(`use_cw_file')dnl dnl FEATURE(`use_ct_file')dnl dnl # Delay_checks allows sender<->recipient checking FEATURE(local_procmail,`',`procmail -t -Y -a $h -d $u')dnl dnl # dnl # The access db is the basis for most of sendmail's checking FEATURE(`access_db', , `skip')dnl FEATURE(`blacklist_recipients')dnl dnl # blacklist to stop spams dnl #FEATURE(`dnsbl', `cblless.anti-spam.org.cn')dnl dnl #FEATURE(`enhdnsbl', `cblplus.anti-spam.org.cn', `"Server address listed at cblplus.anti-spam.org.cn"', `t')dnl FEATURE(`enhdnsbl', `zen.spamhaus.org', `"Spam blocked see: http://www.abuse.net/sbl.phtml?IP="$&{client_addr}', `t')dnl dnl #FEATURE(`access_db',`hash -T<TMPF> -o /etc/mail/access.db')dnl dnl # dnl # The greet_pause feature stops some automail bots - but check the dnl # provided access db for details on excluding localhosts... FEATURE(`greet_pause', `1000')dnl 1 seconds dnl # dnl # Delay_checks allows sender<->recipient checking FEATURE(`delay_checks', `friend', `n')dnl dnl # dnl # If we get too many bad recipients, slow things down... define(`confBAD_RCPT_THROTTLE',`3')dnl dnl # dnl # Stop connections that overflow our concurrent and time connection rates FEATURE(`conncontrol', `nodelay', `terminate')dnl FEATURE(`ratecontrol', `nodelay', `terminate')dnl dnl # dnl # If you're on a dialup link, you should enable this - so sendmail dnl # will not bring up the link (it will queue mail for later) dnl define(`confCON_EXPENSIVE',`True')dnl dnl # dnl # Dialup/LAN connection overrides dnl # include(`/etc/mail/m4/dialup.m4')dnl include(`/etc/mail/m4/provider.m4')dnl FEATURE(`smrsh')dnl FEATURE(`mailertable')dnl FEATURE(`virtusertable',`hash -o /etc/mail/virtusertable.db')dnl dnl # add 2013-11-8 FEATURE(masquerade_envelope)dnl dnl MASQUERADE_DOMAIN(hotmail.com)dnl MASQUERADE_DOMAIN_FILE(`/etc/mail/masquerade-domain')dnl MASQUERADE_AS(xxx.xxx.edu.cn)dnl dnl # dnl # dnl # Also accept email sent to "localhost.localdomain" as local email. dnl # LOCAL_DOMAIN(`xxx.xxx.edu.cn')dnl LOCAL_DOMAIN(`xxx.xxx.cn')dnl LOCAL_DOMAIN(`xxx.cs.xxx.edu.cn')dnl LOCAL_DOMAIN(`xxx.cs.xxx.cn')dnl dnl # Default Mailer setup dnl #MAILER_DEFINITIONS MAILER(`smtp')dnl MAILER(`procmail')dnl MAILER(`local')dnl兩個例子：
163:
From example@company.com Wed Dec 21 21:47:26 2016 Return-Path: <example@company.com> Received: from m13-141.163.com (m13-141.163.com [220.181.13.141]) by company.com (8.14.3/8.14.3/Debian-9.1ubuntu1) with ESMTP id uBLDlPiQ013409 for <xxx@company.com>; Wed, 21 Dec 2016 21:47:26 +0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=Date:From:Subject:MIME-Version:Message-ID; bh=hpaD0 qA4I59smafOVhBxwFe3a15FCNfA2uxigC6sgOY=; b=JdNTQe6QHM1TCcgvPCHtw 0Lkr1iMuJpydrsSpywGH8QnwV0hMucgh0IO+jg4THKW+2hr/IaVbQJoJabx2W/Mr nQ2YWwc7ECDVaFqU9HJJygtqcrP3d2cp3qBbGlq/YVUUkXidTeX52kQStnULVBzk FEJFuAYeRA/4XZyeo5LxNM= Received: from example$163.com ( [192.198.95.71, 54.215.2.217, 10.144.1.72] ) by ajax-webmail-wmsvr141 (Coremail) ; Wed, 21 Dec 2016 21:46:07 +0800 (CST) X-Originating-IP: [192.198.95.71, 54.215.2.217, 10.144.1.72] Date: Wed, 21 Dec 2016 21:46:07 +0800 (CST) From: "example" <example@company.com> To: "xxx@company.com" <xxx@company.com> Subject: aaaaa X-Priority: 3 X-Mailer: Coremail Webmail Server Version SP_ntes V3.5 build 20160729(86883.8884) Copyright (c) 2002-2016 www.mailtech.cn 163com X-CM-CTRLDATA: RB7qyGZvb3Rlcl9odG09MjcyNTo1Ng== Content-Type: multipart/alternative; boundary="----=_Part_12111914_355555859.1482327967157" MIME-Version: 1.0 Message-ID: <7e744d1.2de269.15921a1c5b6.Coremail.xysmlx@163.com> X-Coremail-Locale: zh_CN X-CM-TRANSID:jcGowACXpqKfh1pYSOaiAA--.29831W X-CM-SenderInfo: p01vzzr06rljoofrz/1tbiNQ1HvlSIRLiDogABsB X-Coremail-Antispam: 1U5529EdanIXcx71UUUUU7vcSsGvfC2KfnxnUU== Status: RO X-UID: 336 Content-Length: 4432郵箱：
From example@company.com Wed Dec 21 22:52:39 2016 Return-Path: <example@company.com> Received: from mail-ua0-f178.google.com (mail-ua0-f178.google.com [209.85.217.178]) by company.com (8.14.3/8.14.3/Debian-9.1ubuntu1) with ESMTP id uBLEqbPm019461 for <xxx@company.com>; Wed, 21 Dec 2016 22:52:38 +0800 Received: by mail-ua0-f178.google.com with SMTP id 2so79983525uax.2 for <xxx@company.com>; Wed, 21 Dec 2016 06:52:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=+fBXgxbVSyjlxMpSNMOsZLbhE2bqAQI97mJviWO7ebE=; b=l1SM9poejQhkOB7y725tK1K8oCsbxSENpl+po0nU+AHzyNE0BguFHgLLrFMj7vnuPG ARR0mhWhVow3Pikzeq+IrymrsbnEqyOwgehR/ztTYDY8TPfpghK3O7eRPr9XVhC8oFs+ Il9rCu324IljhOstd/5cWhGkwhA/m2F1bLUoxYw0O18GLVE85uQnH7PZe04W21vPLDVq fuJlrbNFSo4Fxbe626IaS/1CVIUrs5Wkz1YExfa7pADbiqc3RNrEErBrk4FfWRPdHN/y 7z7PxqpHvBs+SG2IMx5eCRA5zdsczQvNXHIy3yIHvwkeydYi77PPzR8qUZ2pSfomzmKu LKCg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=+fBXgxbVSyjlxMpSNMOsZLbhE2bqAQI97mJviWO7ebE=; b=CzacaxE4CvL4uxlG4qUkbEm+vAiix3+UR+I7D0xechpMyOGoGrjE/rVfOXl/Zk+8Rr +F4xjJ+kTd7jv1C5d1NGk7CtjMl8mZpUk2bE7WesYV8PryUbY7b6mHpB7XjL3J3AD90o UVPpyX9vjeVJ89E03a1rg05yILGEHWh/E3+bByw68HPxdyCss2I0Tri98030QBWRHasj 7BX6qswHzpo2+87yvRpcsBqoSoKgz4L7ydPMt+zXCmxN2VCqw5MX6vLyzuaOIyWR6RFd Uda7z9lqKw8bOo1ntxaMSTwiHmRWZyWtarvB/1MxPRySsJDIc+4tw1YLbfBNNYiWf3C8 /SMQ== X-Gm-Message-State: AIkVDXKc6Fge9ySWKwRQDYsVUzsuNqgZ9VBci7aM/TEGB915XFQonbYpgBCqBzht712z1QTbDXlrek9X6dKWfA== X-Received: by 10.176.85.139 with SMTP id v11mr632414uaa.7.1482331912496; Wed, 21 Dec 2016 06:51:52 -0800 (PST) MIME-Version: 1.0 Received: by 10.176.16.145 with HTTP; Wed, 21 Dec 2016 06:51:12 -0800 (PST) From: example <example@company.com> Date: Wed, 21 Dec 2016 22:51:12 +0800 Message-ID: <CAO+bwXcoowGtdtZBsQB44K27gUtCJEbpuRKpPj=w66YDQE828g@mail.gmail.com> Subject: fdasfdasfdasdasffdas To: xxx@company.com Content-Type: multipart/alternative; boundary=f403045e286e156bca05442c4b0d X-UID: 340 Status: RO Content-Length: 2500
關閉偽裝選項：
您可以讓您的主機偽裝成另一個使用
MASQUERADE_AS(`host.domain')這會導致發送的郵件被標記為來自指定的 host.domain，而不是 $j。