我的main.cf：
smtpd_banner = $myhostname ESMTP biff = no append_dot_mydomain = no readme_directory = no smtpd_use_tls = yes smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtpd_relay_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination, permit myhostname = mail.neonnuke.tech alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases myorigin = /etc/mailname mydestination = localhost, localhost.neonnuke.tech, mail.neonnuke.tech relayhost = mynetworks = 127.0.0.0/8 192.168.0.0/24 209.85.220.0/24 209.85.216.0/24 [::ffff:127.0.0.0]/104 [::1]/128 mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all inet_protocols = all home_mailbox = Maildir/ smtpd_sasl_auth_enable = yes smtpd_sasl_type = dovecot smtpd_sasl_path = private/dovecot-auth smtpd_sasl_authenticated_header = yes smtpd_sasl_security_options = noanonymous smtpd_sasl_local_domain = $myhostname broken_sasl_auth_clients = yes mailbox_command = /usr/lib/dovecot/deliver -c /etc/dovecot/dovecot.conf -m "${EXTENSION}" smtp_use_tls = yes smtpd_tls_received_header = yes smtpd_tls_mandatory_protocols = SSLv3, TLSv1 smtpd_tls_mandatory_ciphers = medium smtpd_tls_auth_only = yes tls_random_source = dev:/dev/urandom smtpd_helo_required = yes smtpd_helo_restrictions = permit_mynetworks, reject_non_fqdn_helo_hostname, reject_invalid_helo_hostname, reject_unknown_helo_hostname, permit smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unknown_client_hostname, reject_unknown_sender_domain, reject_unknown_recipient_domain, reject_invalid_hostname, reject_non_fqdn_sender, permit smtpd_sender_restrictions = reject_unknown_sender_domain, reject_sender_login_mismatch smtpd_sender_login_maps = $virtual_mailbox_maps unknown_address_reject_code = 550 unknown_hostname_reject_code = 550 unknown_client_reject_code = 550 smtpd_tls_ask_ccert = yes smtpd_tls_cert_file = /etc/ssl/private/ssl-chain-mail-yourdomain.pem smtpd_tls_key_file = /etc/ssl/private/ssl-key-decrypted-mail-yourdomain.key smtpd_tls_CAfile = /etc/ssl/certs/ca-certificates.crt smtpd_tls_ciphers = high smptd_tls_loglevel = 1 smtpd_tls_security_level = may smtpd_tls_session_cache_timeout = 3600s canonical_maps = hash:/etc/postfix/canonical message_size_limit = 104857600 virtual_alias_maps = hash:/etc/postfix/virtual virtual_mailbox_domains = hash:/etc/postfix/virtual-mailbox-domains virtual_mailbox_maps = hash:/etc/postfix/virtual-mailbox-users virtual_transport = dovecot dovecot_destination_recipient_limit = 1 default_destination_concurrency_limit = 5 disable_vrfy_command = yes relay_destination_concurrency_limit = 1 smtp_tls_note_starttls_offer = yes smtp_tls_security_level = may milter_default_action = accept milter_connect_macros = j {daemon_name} v {if_name} _ non_smtpd_milters = $smtpd_milters smtpd_milters = unix:/spamass/spamass.sock unix:/clamav/clamav-milter.ctl unix:/opendkim/opendkim.sock postscreen_greet_action = enforce postscreen_dnsbl_action = enforce postscreen_access_list = permit_mynetworks postscreen_dnsbl_sites = zen.spamhaus.org, b.barracudacentral.org,bl.spamcop.net virtual_maps = hash:/etc/postfix/virtusertable 我的mail.log：
Jan 1 20:38:48 ubuntu-standard postfix/postscreen[18881]: CONNECT from [86.6.181.24]:38535 to [192.168.0.13]:25 Jan 1 20:38:48 ubuntu-standard postfix/dnsblog[18883]: addr 86.6.181.24 listed by domain zen.spamhaus.org as 127.0.0.11 Jan 1 20:38:49 ubuntu-standard postfix/postscreen[18881]: DNSBL rank 1 for [86.6.181.24]:38535 Jan 1 20:38:49 ubuntu-standard postfix/smtp[18879]: warning: host mail.neonnuke.tech[86.6.181.24]:25 greeted me with my own hostname mail.neonnuke.tech Jan 1 20:38:49 ubuntu-standard postfix/smtp[18879]: warning: host mail.neonnuke.tech[86.6.181.24]:25 replied to HELO/EHLO with my own hostname mail.neonnuke.tech Jan 1 20:38:49 ubuntu-standard postfix/smtp[18879]: B6E7741DEF: to=<[email protected]>, relay=mail.neonnuke.tech[86.6.181.24]:25, delay=0.61, delays=0.02/0/0.59/0, dsn=5.4.6, status=bounced (mail for neonnuke.tech loops back to myself) Jan 1 20:38:49 ubuntu-standard postfix/postscreen[18881]: DISCONNECT [86.6.181.24]:38535 Jan 1 20:38:49 ubuntu-standard postfix/qmgr[18439]: B6E7741DEF: removed
即使我将我的公共IPjoin到我的networking中，所以它不会被zenhaus检查，它仍然是一样的。 这是从另一台计算机在同一networking发送，但即使从谷歌发送它被发送，但它不会被发送到192.168.0.13。
例如：
Jan 1 20:47:11 ubuntu-standard postfix/postscreen[19621]: CONNECT from [209.85.220.175]:35280 to [192.168.0.13]:25 Jan 1 20:47:11 ubuntu-standard postfix/postscreen[19621]: WHITELISTED [209.85.220.175]:35280 Jan 1 20:47:12 ubuntu-standard postfix/smtpd[19622]: connect from mail-qk0-f175.google.com[209.85.220.175] Jan 1 20:47:12 ubuntu-standard postfix/smtpd[19622]: warning: connect to Milter service unix:/opendkim/opendkim.sock: No such file or directory Jan 1 20:47:13 ubuntu-standard postfix/smtpd[19622]: E9FC24192A: client=mail-qk0-f175.google.com[209.85.220.175] Jan 1 20:47:14 ubuntu-standard postfix/cleanup[19630]: E9FC24192A: message-id=<CAPppPrR=WOnYTUCDSDt2kz6QeN9d93QGr2H_+OeSxgQs4N_8sQ@mail.gmail.com> Jan 1 20:47:14 ubuntu-standard spamc[19631]: connect(AF_UNIX) to spamd using --socket='/var/spool/postfix/spamassassin/spamd.sock' failed: Connection refused Jan 1 20:47:14 ubuntu-standard postfix/qmgr[18439]: E9FC24192A: from=<[email protected]>, size=2624, nrcpt=1 (queue active) Jan 1 20:47:14 ubuntu-standard postfix/smtpd[19622]: disconnect from mail-qk0-f175.google.com[209.85.220.175] ehlo=2 starttls=1 mail=1 rcpt=1 data=1 quit=1 commands=7 Jan 1 20:47:14 ubuntu-standard postfix/postscreen[19621]: CONNECT from [86.6.181.24]:38536 to [192.168.0.13]:25 Jan 1 20:47:14 ubuntu-standard postfix/dnsblog[19636]: addr 86.6.181.24 listed by domain zen.spamhaus.org as 127.0.0.11 Jan 1 20:47:17 ubuntu-standard postfix/postscreen[19621]: DNSBL rank 1 for [86.6.181.24]:38536 Jan 1 20:47:17 ubuntu-standard postfix/smtp[19633]: warning: host mail.neonnuke.tech[86.6.181.24]:25 greeted me with my own hostname mail.neonnuke.tech Jan 1 20:47:17 ubuntu-standard postfix/smtp[19633]: warning: host mail.neonnuke.tech[86.6.181.24]:25 replied to HELO/EHLO with my own hostname mail.neonnuke.tech Jan 1 20:47:17 ubuntu-standard postfix/smtp[19633]: E9FC24192A: to=<[email protected]>, relay=mail.neonnuke.tech[86.6.181.24]:25, delay=3.7, delays=0.5/0.06/3.1/0, dsn=5.4.6, status=bounced (mail for neonnuke.tech loops back to myself) Jan 1 20:47:17 ubuntu-standard postfix/postscreen[19621]: DISCONNECT [86.6.181.24]:38536 Jan 1 20:47:17 ubuntu-standard postfix/cleanup[19630]: 7E7C941DEE: message-id=<[email protected]> Jan 1 20:47:17 ubuntu-standard postfix/qmgr[18439]: 7E7C941DEE: from=<>, size=4551, nrcpt=1 (queue active) Jan 1 20:47:17 ubuntu-standard postfix/bounce[19643]: E9FC24192A: sender non-delivery notification: 7E7C941DEE Jan 1 20:47:17 ubuntu-standard postfix/qmgr[18439]: E9FC24192A: removed
您尚未将Postfixconfiguration为接受发往neonnuke.tech域的邮件，但您已将MXloggingconfiguration为指向此邮件服务器。 Postfix不知道如何处理这封邮件，发现它收到了邮件正在发送的邮件。
要解决这个问题，你需要告诉Postfix接受neonnuke.tech邮件，例如把它添加到mydestination或者virtual_alias_domains 。
对于奖励积分，由于服务器位于某种NAT的后面，因此不知道它是否可以通过其全球IP地址访问，所以您将收到关于主机的消息，并用您自己的主机名称向我发送问候。 一旦邮件服务器知道它对该域的邮件是权威的，这也将消失。
所以，这个问题源于postfix使用SMTP 发送邮件，而另一台主机使用它自己的主机名称来迎接它：
mail.neonnuke.tech[86.6.181.24]:25 replied to HELO/EHLO with my own hostname mail.neonnuke.tech
但为什么呢？ 根据日志，86.6.181.24已经试图将邮件发送到日志来自的机器（192.168.0.13）。 这是为什么？
E9FC24192A: to=<[email protected]>, relay=mail.neonnuke.tech[86.6.181.24]:25,
似乎表明，86.6.181.24并不认为自己是“neonnuke.tech”的最终目的地，因此将邮件传递给我们。
但我们的机器也不认为自己的最终目的地 – 唉，neonnuke.tech不在我的目的地：
mydestination = localhost, localhost.neonnuke.tech, mail.neonnuke.tech
解决scheme ：改变我的目标：
mydestination = localhost, localhost.$mydomain, $myhostname, $mydomain
然后再试一次。
Jan 1 20:47:12 ubuntu-standard postfix/smtpd[19622]: warning: connect to Milter service unix:/opendkim/opendkim.sock: No such file or directory
表示opendkim milter没有运行，或者在错误的目录中创build它的套接字。