Gmail 邮件签名失败。不知道为什么。它通过 Telnet 验证，但 Mail 命令失败。以下是原始邮件响应：
Delivered-To: [email protected]
Received: by 10.100.177.142 with SMTP id j14csp1917050pjb;
Tue, 2 May 2017 08:11:12 -0700 (PDT)
X-Received: by 10.200.41.8 with SMTP id y8mr27532431qty.220.1493737872152;
Tue, 02 May 2017 08:11:12 -0700 (PDT)
Return-Path: <[email protected]>
Received: from test1.mpx.test.com (ec2-xx-xx-xx-xx.compute-1.amazonaws.com. [xx.xx.xx.xx])
by mx.google.com with ESMTPS id k43si17514690qta.19.2017.05.02.08.11.12
for <[email protected]>
(version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);
Tue, 02 May 2017 08:11:12 -0700 (PDT)
Received-SPF: pass (google.com: domain of [email protected] designates xx.xx.xx.xx as permitted sender) client-ip=xx.xx.xx.xx;
Authentication-Results: mx.google.com;
dkim=fail [email protected];
spf=pass (google.com: domain of [email protected] designates xx.xx.xx.xx as permitted sender) [email protected];
dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=test.com
Received: from mongobkp3.test.local (mongobkp3.test.local [xx.xx.xx.xx]) by test1.mpx.test.com (Postfix) with ESMTP id D18F2611B2 for <[email protected]>; Tue,
2 May 2017 15:11:11 +0000 (UTC)
X-DKIM: Sendmail DKIM Filter v2.8.3 test11.mpx.test.com D18F2611B2
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mpx.test.com; s=ggmx2; t=1493737871; bh=ehVmMHs7ThAQbbHJS1xFhiviXLfcCW/H8SCDhdqpBjk=; h=Date:To:MIME-Version:Content-Type:Content-Transfer-Encoding:
Message-Id:From; b=nQANMdy69jSkfQW/jOaZqKsN8gLj5GhiH4CQv8NXy5orGi5eqVt4RpBnz2ZVlUdUX
qrfZGXHR1YufY8Ij0IM6eZvlC8uP4H37N0ItKXkLSLMT2PZb2gkIL/QY+6ToKkkiWO
n3HTj7HWpdWxIp8uXrLuX03080v38lgPD0nds3lg=
Received: by mongobkp3.test.local (Postfix, from userid 1085) id CC0AE41E78; Tue,
我的 master.cf 如下所示：
#
# Postfix master process configuration file. For details on the format
# of the file, see the master(5) manual page (command: "man 5 master").
#
# ==========================================================================
# service type private unpriv chroot wakeup maxproc command + args
# (yes) (yes) (yes) (never) (100)
# ==========================================================================
smtp inet n - n - - smtpd -v
# -o content_filter=dksign
submission inet n - n - - smtpd
587 inet n - n - - smtpd -v
# -o smtpd_enforce_tls=yes
-o smtpd_sasl_auth_enable=yes
# -o content_filter=dksign
# -o smtpd_client_restrictions=permit_sasl_authenticated,reject
#smtps inet n - n - - smtpd
# -o smtpd_tls_wrappermode=yes
# -o smtpd_sasl_auth_enable=yes
# -o smtpd_client_restrictions=permit_sasl_authenticated,reject
#628 inet n - n - - qmqpd
pickup fifo n - n 60 1 pickup
cleanup unix n - n - 0 cleanup
qmgr fifo n - n 300 1 qmgr
#qmgr fifo n - n 300 1 oqmgr
tlsmgr unix - - n 1000? 1 tlsmgr
rewrite unix - - n - - trivial-rewrite
bounce unix - - n - 0 bounce
defer unix - - n - 0 bounce
trace unix - - n - 0 bounce
verify unix - - n - 1 verify
flush unix n - n 1000? 0 flush
proxymap unix - - n - - proxymap
smtp unix - - n - - smtp
# When relaying mail as backup MX, disable fallback_relay to avoid MX loops
relay unix - - n - - smtp
-o fallback_relay=
# -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq unix n - n - - showq
error unix - - n - - error
discard unix - - n - - discard
local unix - n n - - local
virtual unix - n n - - virtual
lmtp unix - - n - - lmtp
anvil unix - - n - 1 anvil
scache unix - - n - 1 scache
#
# ====================================================================
# Interfaces to non-Postfix software. Be sure to examine the manual
# pages of the non-Postfix software to find out what options it wants.
#
#
# Many of the following services use the Postfix pipe(8) delivery
# agent. See the pipe(8) man page for information about ${recipient}
# and other message envelope options.
# ====================================================================
#
# maildrop. See the Postfix MAILDROP_README file for details.
# Also specify in main.cf: maildrop_destination_recipient_limit=1
#
maildrop unix - n n - - pipe
flags=DRhu user=vmail argv=/usr/local/bin/maildrop -d ${recipient}
#
# The Cyrus deliver program has changed incompatibly, multiple times.
#
old-cyrus unix - n n - - pipe
flags=R user=cyrus argv=/usr/lib/cyrus-imapd/deliver -e -m ${extension} ${user}
# Cyrus 2.1.5 (Amos Gouaux)
# Also specify in main.cf: cyrus_destination_recipient_limit=1
cyrus unix - n n - - pipe
user=cyrus argv=/usr/lib/cyrus-imapd/deliver -e -r ${sender} -m ${extension} ${user}
#
# See the Postfix UUCP_README file for configuration details.
#
uucp unix - n n - - pipe
flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
#
# Other external delivery methods.
#
ifmail unix - n n - - pipe
flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp unix - n n - - pipe
flags=Fq. user=foo argv=/usr/local/sbin/bsmtp -f $sender $nexthop $recipient
我的 main.cf 如下所示：
# RR: Mon Apr 29, 2013 => added 72.172.71.2/32 to support (LA) Duo VPN
queue_directory = /var/spool/postfix
command_directory = /usr/sbin
daemon_directory = /usr/libexec/postfix
mail_owner = postfix
myhostname = test1.mpx.test.com
mydomain = mpx.test.com
masquerade_domains = !jetsetter.com !parkandbond.com !testcity.com !testtaste.com !wsjselect.com !mx.test.com !qatools.test.com test.com $mydomain
mynetworks =
XX.XX.XX.XX
XX.XX.XX.XX
XX.XX.XX.XX
$myhostname
smtpd_delay_reject = yes
smtpd_helo_required = yes
soft_bounce = no
strict_rfc821_envelopes = yes
local_header_rewrite_clients = permit_mynetworks
smtp_generic_maps = pcre:/etc/postfix/generic
unknown_local_recipient_reject_code = 550
broken_sasl_auth_clients = no
smtpd_sasl_application_name = smtpd
smtpd_sasl_auth_enable = no
smtpd_sasl_local_domain =
smtpd_sasl_security_options = noanonymous
#smtpd_enforce_tls = no
#smtpd_tls_CAfile = /etc/postfix/cacert.pem
#smtpd_tls_cert_file = /etc/postfix/mx1-cert.pem
#smtpd_tls_key_file = /etc/postfix/mx1-key.pem
#smtpd_tls_received_header = yes
#smtpd_tls_session_cache_database = btree:/var/spool/postfix/smtpd_tls_session_cache
#tls_random_source = dev:/dev/urandom
#smtpd_tls_security_level = may
mailbox_size_limit = 102400000
message_size_limit = 51200000
queue_minfree = 76800000
smtpd_client_restrictions =
permit_mynetworks,
permit_sasl_authenticated,
reject_unknown_client
smtpd_helo_restrictions =
permit_mynetworks,
permit_sasl_authenticated,
reject_invalid_hostname,
reject_non_fqdn_hostname
smtpd_sender_restrictions =
permit_mynetworks,
permit_sasl_authenticated,
reject_unlisted_sender,
reject_non_fqdn_sender,
reject_unknown_sender_domain
smtpd_recipient_restrictions =
permit_mynetworks,
permit_sasl_authenticated,
reject_unlisted_recipient,
reject_non_fqdn_recipient,
reject_unauth_destination,
reject_unknown_recipient_domain
# check_recipient_access hash:/etc/postfix/filtered_domains
smtpd_data_restrictions =
permit_mynetworks,
reject_unauth_pipelining,
permit_sasl_authenticated
smtpd_end_of_data_restrictions =
unknown_local_recipient_reject_code = 550
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
debug_peer_level = 2
debugger_command =
PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
xxgdb $daemon_directory/$process_name $process_id & sleep 5
sendmail_path = /usr/sbin/sendmail.postfix
newaliases_path = /usr/bin/newaliases.postfix
mailq_path = /usr/bin/mailq.postfix
setgid_group = postdrop
html_directory = no
manpage_directory = /usr/share/man
sample_directory = /usr/share/doc/postfix-2.3.3/samples
readme_directory = /usr/share/doc/postfix-2.3.3/README_FILES
postscreen_upstream_proxy_protocol = haproxy
milter_default_action = accept
milter_protocol = 2
smtpd_milters = inet:localhost:8891
non_smtpd_milters = inet:localhost:8891
smtpd_tls_auth_only = no
smtp_use_tls = yes
smtpd_use_tls = yes
smtp_tls_note_starttls_offer = yes
smtpd_tls_key_file = /etc/ssl/private/mail.mpx.test.com.tld.key
smtpd_tls_cert_file = /etc/ssl/certs/mail.mpx.test.com.tld.crt
smtpd_tls_CAfile = /etc/ssl/certs/cacert.pem
smtp_tls_security_level = encrypt
smtpd_tls_loglevel = 1
#smtpd_tls_received_header = yes
tls_random_source = dev:/dev/urandom
更新！： 如果我复制 smtp_generic_maps，dkim 会通过，但是我的电子邮件中的发件人域会显示为通过我的中继服务器发送的主机。我想知道域映射的工作方式是否有问题：
(.*)@(.*)\.test\.local/ [email protected]
答案1
经过多次故障排除后，我意识到问题在于映射。当您使用 mailx 从外部客户端收到一封电子邮件到您的中继服务器时，/etc/postfix/generic您可以在文件中映射以将邮件作为您的域发送出去。但是，解决问题的一种更简单的方法是使用 mailx 的 -r 选项从客户端发送邮件，并将发件人指定为您想要发送的域中的某个人。例如：
mailx -r testuser@<domainyouwant> -S "test" enduser@<whereever>
这将通过 DKIM 签名并以您想要发送的用户身份发送。
答案2
哦，谷歌将其所需的密钥长度增加到 512。你的看起来像是 128。
编辑：
哦，抱歉。128 是 SSL，不是 DKIM。我的错误。
您能否捕获邮件客户端之间的对话文本并将其与您的 telnet 测试文本进行比较？这可能很有希望。
当您说 telnet 时，您是指 telnet 还是 ssl，例如 openssl s_client？如果您的 telnet 测试是明文的，并且您的邮件客户端正在使用 SSL，那么这是否与此有关？可能不是。那会很奇怪。