后缀 – 用户geting邮件从他们自己,他们没有发送

我们公司在Ubintu 14.04上configuration了postfix / dovecot / amavisd邮件服务器。 该系统已经运行了几年,它运行良好。 最近一些用户开始抱怨自己收到了一些邮件,他们没有发送。 服务器不是一个开放的中继。 我试图启用authentication,但是没有其他邮件可以被收回。

我的问题是,如果可以以任何方式拒绝/拒绝不是从我们的域中的用户发送的邮件?

后缀main.cf:

# Debian specific: Specifying a file name will cause the first # line of that file to be used as the name. The Debian default # is /etc/mailname. #myorigin = /etc/mailname smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no # appending .domain is the MUA's job. append_dot_mydomain = no # Uncomment the next line to generate "delayed mail" warnings #delay_warning_time = 4h readme_directory = /usr/share/doc/postfix # TLS parameters smtpd_tls_cert_file = /etc/postfix/smtpd.cert smtpd_tls_key_file = /etc/postfix/smtpd.key smtpd_use_tls = yes smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache # See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for # information on enabling SSL in the smtp client. smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination myhostname = mail.mxserver.net alias_maps = hash:/etc/aliases, hash:/var/lib/mailman/data/aliases alias_database = hash:/etc/aliases, hash:/var/lib/mailman/data/aliases myorigin = /etc/mailname mydestination = mail.mxserver.net, localhost, localhost.localdomain relayhost = mynetworks = 127.0.0.0/8 mailbox_size_limit = 0 message_size_limit = 0 recipient_delimiter = + inet_interfaces = all html_directory = /usr/share/doc/postfix/html virtual_alias_domains = virtual_alias_maps = proxy:mysql:/etc/postfix/mysql-virtual_forwardings.cf, proxy:mysql:/etc/postfix/mysql-virtual_email2email.cf, hash:/var/lib/mailman/data/virtual-mailman virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql-virtual_domains.cf virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailboxes.cf virtual_mailbox_base = /var/vmail virtual_uid_maps = static:5000 virtual_gid_maps = static:5000 inet_protocols = all smtpd_sasl_auth_enable = yes broken_sasl_auth_clients = yes smtpd_sasl_authenticated_header = yes smtpd_reject_unlisted_sender = yes smtpd_recipient_restrictions = check_recipient_access mysql:/etc/postfix/mysql-virtual_recipient.cf, permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination smtpd_tls_security_level = may transport_maps = hash:/var/lib/mailman/data/transport-mailman, proxy:mysql:/etc/postfix/mysql-virtual_transports.cf relay_domains = mysql:/etc/postfix/mysql-virtual_relaydomains.cf relay_recipient_maps = mysql:/etc/postfix/mysql-virtual_relayrecipientmaps.cf proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $transport_maps $mynetworks #smtpd_sender_restrictions = check_sender_access mysql:/etc/postfix/mysql-virtual_sender.cf smtpd_sender_restrictions = check_sender_access mysql:/etc/postfix/mysql-virtual_sender.cf, permit_sasl_authenticated, permit_mynetworks, reject_unlisted_sender, reject_unknown_sender_domain smtpd_client_restrictions = check_client_access mysql:/etc/postfix/mysql-virtual_client.cf smtpd_client_message_rate_limit = 100 maildrop_destination_concurrency_limit = 1 maildrop_destination_recipient_limit = 1 virtual_transport = dovecot header_checks = regexp:/etc/postfix/header_checks mime_header_checks = regexp:/etc/postfix/mime_header_checks nested_header_checks = regexp:/etc/postfix/nested_header_checks body_checks = regexp:/etc/postfix/body_checks owner_request_special = no smtp_tls_security_level = may dovecot_destination_recipient_limit = 1 smtpd_sasl_type = dovecot smtpd_sasl_path = private/auth content_filter = amavis:[127.0.0.1]:10024 receive_override_options = no_address_mappings # DKIM # -------------------------------------- milter_default_action = accept milter_protocol = 2 smtpd_milters = inet:localhost:8891 non_smtpd_milters = inet:localhost:8891 

Postfix master.cf:

 # # Postfix master process configuration file. For details on the format # of the file, see the master(5) manual page (command: "man 5 master" or # on-line: http://www.postfix.org/master.5.html). # # Do not forget to execute "postfix reload" after editing this file. # # ========================================================================== # service type private unpriv chroot wakeup maxproc command + args # (yes) (yes) (yes) (never) (100) # ========================================================================== smtp inet n - - - - smtpd #smtp inet n - - - 1 postscreen #smtpd pass - - - - - smtpd #dnsblog unix - - - - 0 dnsblog #tlsproxy unix - - - - 0 tlsproxy submission inet n - - - - smtpd -o syslog_name=postfix/submission -o smtpd_tls_security_level=encrypt -o smtpd_sasl_auth_enable=yes -o smtpd_client_restrictions=permit_sasl_authenticated,reject # -o smtpd_reject_unlisted_recipient=no # -o smtpd_client_restrictions=$mua_client_restrictions # -o smtpd_helo_restrictions=$mua_helo_restrictions # -o smtpd_sender_restrictions=$mua_sender_restrictions # -o smtpd_recipient_restrictions= # -o smtpd_relay_restrictions=permit_sasl_authenticated,reject # -o milter_macro_daemon_name=ORIGINATING smtps inet n - - - - smtpd -o syslog_name=postfix/smtps -o smtpd_tls_wrappermode=yes -o smtpd_sasl_auth_enable=yes -o smtpd_client_restrictions=permit_sasl_authenticated,reject # -o syslog_name=postfix/smtps # -o smtpd_tls_wrappermode=yes # -o smtpd_sasl_auth_enable=yes # -o smtpd_reject_unlisted_recipient=no # -o smtpd_client_restrictions=$mua_client_restrictions # -o smtpd_helo_restrictions=$mua_helo_restrictions # -o smtpd_sender_restrictions=$mua_sender_restrictions # -o smtpd_recipient_restrictions= # -o smtpd_relay_restrictions=permit_sasl_authenticated,reject # -o milter_macro_daemon_name=ORIGINATING #628 inet n - - - - qmqpd pickup unix n - - 60 1 pickup cleanup unix n - - - 0 cleanup qmgr unix n - n 300 1 qmgr #qmgr unix n - n 300 1 oqmgr tlsmgr unix - - - 1000? 1 tlsmgr rewrite unix - - - - - trivial-rewrite bounce unix - - - - 0 bounce defer unix - - - - 0 bounce trace unix - - - - 0 bounce verify unix - - - - 1 verify flush unix n - - 1000? 0 flush proxymap unix - - n - - proxymap proxywrite unix - - n - 1 proxymap smtp unix - - - - - smtp relay unix - - - - - smtp # -o smtp_helo_timeout=5 -o smtp_connect_timeout=5 showq unix n - - - - showq error unix - - - - - error retry unix - - - - - error discard unix - - - - - discard local unix - nn - - local virtual unix - nn - - virtual lmtp unix - - - - - lmtp anvil unix - - - - 1 anvil scache unix - - - - 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 - nn - - pipe flags=DRhu user=vmail argv=/usr/bin/maildrop -d vmail ${extension} ${recipient} ${user} ${nexthop} ${sender} # # ==================================================================== # # Recent Cyrus versions can use the existing "lmtp" master.cf entry. # # Specify in cyrus.conf: # lmtp cmd="lmtpd -a" listen="localhost:lmtp" proto=tcp4 # # Specify in main.cf one or more of the following: # mailbox_transport = lmtp:inet:localhost # virtual_transport = lmtp:inet:localhost # # ==================================================================== # # Cyrus 2.1.5 (Amos Gouaux) # Also specify in main.cf: cyrus_destination_recipient_limit=1 # #cyrus unix - nn - - pipe # user=cyrus argv=/cyrus/bin/deliver -e -r ${sender} -m ${extension} ${user} # # ==================================================================== # Old example of delivery via Cyrus. # #old-cyrus unix - nn - - pipe # flags=R user=cyrus argv=/cyrus/bin/deliver -e -m ${extension} ${user} # # ==================================================================== # # See the Postfix UUCP_README file for configuration details. # uucp unix - nn - - pipe flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient) # # Other external delivery methods. # ifmail unix - nn - - pipe flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient) bsmtp unix - nn - - pipe flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient scalemail-backend unix - nn - 2 pipe flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension} mailman unix - nn - - pipe flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py ${nexthop} ${user} dovecot unix - nn - - pipe flags=DROhu user=vmail:vmail argv=/usr/lib/dovecot/deliver -f ${sender} -d ${user}@${nexthop} amavis unix - - - - 2 smtp -o smtp_data_done_timeout=1200 -o smtp_send_xforward_command=yes 127.0.0.1:10025 inet n - - - - smtpd -o content_filter= -o local_recipient_maps= -o relay_recipient_maps= -o smtpd_restriction_classes= -o smtpd_client_restrictions= -o smtpd_helo_restrictions= -o smtpd_sender_restrictions= -o smtpd_recipient_restrictions=permit_mynetworks,reject -o mynetworks=127.0.0.0/8 -o strict_rfc821_envelopes=yes -o receive_override_options=no_unknown_recipient_checks,no_header_body_checks,no_milters 

在DNS级别为您的域添加spflogging。 您可以从在线spf向导创buildspflogging。 这是一个txtlogging,应该看起来像这样

 example.com. IN TXT "v=spf1 mx a -all" 

然后configuration你的服务器来检查spf。

https://help.ubuntu.com/community/Postfix/SPF

您可以使用smtpd_restriction_classes

 # /etc/postfix/main.cf smtpd_restriction_classes = restricted_sender restricted_sender = permit_mynetworks, permit_sasl_authenticated, reject smtpd_sender_restrictions = check_sender_access hash:/etc/postfix/restricted_domain reject_non_fqdn_sender 

将所有域添加到列表中

 # cat /etc/postfix/restricted_domain example.com restricted_sender example.net restricted_sender # postmap /etc/postfix/restricted_domain # postconf mynetworks mynetworks = 127.0.0.0/8 

一些基本的testing

在我的networking发件人。 没有身份validation – 访问授权

 # echo "Hello world" | swaks -4 --server localhost --from [email protected] --to [email protected] --h-Subject "Test message" --body - === Trying localhost:25... === Connected to localhost. <- 220 smtp.example.net ESMTP Postfix -> EHLO jenkins.example.net <- 250-smtp.example.net <- 250-PIPELINING <- 250-SIZE 10240000 <- 250-VRFY <- 250-ETRN <- 250-ENHANCEDSTATUSCODES <- 250-8BITMIME <- 250 DSN -> MAIL FROM:<[email protected]> <- 250 2.1.0 Ok -> RCPT TO:<[email protected]> <- 250 2.1.5 Ok -> DATA <- 354 End data with <CR><LF>.<CR><LF> -> Date: Fri, 25 Mar 2016 10:12:47 +0000 -> To: [email protected] -> From: [email protected] -> Subject: Test message -> X-Mailer: swaks v20130209.0 jetmore.org/john/code/swaks/ -> -> Hello world -> -> -> . <- 250 2.0.0 Ok: queued as 327251C1566 -> QUIT <- 221 2.0.0 Bye === Connection closed with remote host. 

发件人在我的networking之外。 没有身份validation – 访问被拒绝

 # echo "Hello world" | swaks -4 --server smtp.example.net --from [email protected] --to [email protected] --h-Subject "Test message" --body - === Trying 192.168.88.87:25... === Connected to 192.168.88.87. <- 220 smtp.example.net ESMTP Postfix -> EHLO tl-resin-node1.example.net <- 250-smtp.example.net <- 250-PIPELINING <- 250-SIZE 10240000 <- 250-VRFY <- 250-ETRN <- 250-ENHANCEDSTATUSCODES <- 250-8BITMIME <- 250 DSN -> MAIL FROM:<[email protected]> <- 250 2.1.0 Ok -> RCPT TO:<[email protected]> <** 554 5.7.1 <[email protected]>: Sender address rejected: Access denied -> QUIT <- 221 2.0.0 Bye === Connection closed with remote host. 

发件人在我的networking之外。 通过身份validation – 访问授予

 # echo "Hello world" | swaks -4 --server smtp.example.net --auth PLAIN --auth-user [email protected] --auth-password 1234567 --from [email protected] --to [email protected] --h-Subject "Test message" --body - === Trying 192.168.88.87:25... === Connected to 192.168.88.87. <- 220 smtp.example.net ESMTP Postfix -> EHLO tl-resin-node1.example.net <- 250-smtp.example.net <- 250-PIPELINING <- 250-SIZE 10240000 <- 250-VRFY <- 250-ETRN <- 250-AUTH LOGIN PLAIN <- 250-ENHANCEDSTATUSCODES <- 250-8BITMIME <- 250 DSN -> AUTH PLAIN [HASH] <- 235 2.7.0 Authentication successful -> MAIL FROM:<[email protected]> <- 250 2.1.0 Ok -> RCPT TO:<[email protected]> <- 250 2.1.5 Ok -> DATA <- 354 End data with <CR><LF>.<CR><LF> -> Date: Fri, 25 Mar 2016 06:20:10 -0400 -> To: [email protected] -> From: [email protected] -> Subject: Test message -> X-Mailer: swaks v20130209.0 jetmore.org/john/code/swaks/ -> -> Hello world -> -> -> . <- 250 2.0.0 Ok: queued as D04581C7EAD -> QUIT <- 221 2.0.0 Bye === Connection closed with remote host.