我目前正在尝试向我的网站添加联系表单，但postfix似乎没有发送邮件。这是我的邮件测试脚本：
<?php
ini_set( 'display_errors', 1 );
error_reporting( E_ALL );
$from = "test@induce.tech";
$to = "mbergwall2222@gmail.com";
$subject = "PHP Mail Test script";
$message = "This is a test to check the PHP Mail functionality";
$headers = "From:" . $from;
mail($to,$subject,$message, $headers);
echo "Test email sent";
?>
脚本回应了这个：
Test email sent
但没有邮件被发送。我检查了我的postfix邮件日志，这就是我所看到的：
Jun 27 17:09:01 mbergwall2222 postfix/smtp[21196]: A0FDB41107: to=<root@mbergwall2222>, relay=none, delay=0.04, delays=0/0/0.03/0, dsn=5.4.4, status=bounced (Host or domain name not found. Name service error for name=mbergwall2222 type=A: Host not found)
Jun 27 17:09:01 mbergwall2222 postfix/qmgr[1915]: A0FDB41107: removed
好像我的主机名可能存在问题。如果我在SSH中hostname，它会返回induce.tech（这是正确的，这是我的服务器所在的域名。这是我的postfix main.cf：
# See /usr/share/postfix/main.cf.dist for a commented, more complete version
# 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 $mail_name (Ubuntu)
biff = no
# appending .domain is the MUA's job.
append_dot_mydomain = no
# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h
readme_directory = no
# TLS parameters
smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
smtpd_use_tls=yes
smtpd_tls_session_cache_database = btree:${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 = induce.tech
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
mydestination = localhost
relayhost =
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = loopback-only
inet_protocols = ipv4
local_transport = error:local delivery is disabled
smtp_helo_name = $myhostname.example.com
以下是我的两个主机文件：
的/ etc /主机
# Your system has configured 'manage_etc_hosts' as True.
# As a result, if you wish for changes to this file to persist
# then you will need to either
# a.) make changes to the master file in /etc/cloud/templates/hosts.tmpl
# b.) change or remove the value of 'manage_etc_hosts' in
# /etc/cloud/cloud.cfg or cloud-config from user-data
#
127.0.1.1 induce.tech
127.0.0.1 localhost
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
的/ etc /主机名
induce.tech
注意：我在这个Ubuntu服务器的控制面板上使用服务器指挥！
主持人：数字海洋
让我知道是否有人可以提供帮助！谢谢！
编辑：这是我的phpinfo（）： Pastebin
EDIT2：这是正确的日志文件：
[27-Jun-2017 17:03:50 UTC] mail() on [/srv/users/induce/apps/induce/public/portfolio/php/contact.php:9]: To: mbergwall2222@gmail.com -- Headers: From: contact@induce.tech Reply-to: mattthefat2222@gmail.com -- Subject: test
[27-Jun-2017 17:05:48 UTC] mail() on [/srv/users/induce/apps/induce/public/portfolio/php/contact.php:9]: To: mbergwall2222@gmail.com -- Headers: From: contact@induce.tech Reply-to: mattthefat2222@gmail.com -- Subject: Test
[27-Jun-2017 17:08:17 UTC] mail() on [/srv/users/induce/apps/induce/public/portfolio/php/contact.php:10]: To: mbergwall2222@gmail.com -- Headers: From:test@induce.tech -- Subject: PHP Mail Test script
[27-Jun-2017 17:12:12 UTC] mail() on [/srv/users/induce/apps/induce/public/portfolio/php/contact.php:10]: To: mbergwall2222@gmail.com -- Headers: From:test@induce.tech -- Subject: PHP Mail Test script
[27-Jun-2017 17:16:13 UTC] mail() on [/srv/users/induce/apps/induce/public/portfolio/php/contact.php:10]: To: mbergwall2222@gmail.com -- Headers: From:test@induce.tech -- Subject: PHP Mail Test script
[27-Jun-2017 17:16:16 UTC] mail() on [/srv/users/induce/apps/induce/public/portfolio/php/contact.php:10]: To: mbergwall2222@gmail.com -- Headers: From:test@induce.tech -- Subject: PHP Mail Test script
[27-Jun-2017 17:22:23 UTC] mail() on [/srv/users/induce/apps/induce/public/portfolio/php/contact.php:10]: To: mbergwall2222@gmail.com -- Headers: From:test@induce.tech -- Subject: PHP Mail Test script
[27-Jun-2017 17:29:35 UTC] mail() on [/srv/users/induce/apps/induce/public/portfolio/php/contact.php:10]: To: mbergwall2222@gmail.com -- Headers: From:test@induce.tech -- Subject: PHP Mail Test script
EDIT3：以下是postconf -n
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
inet_interfaces = all
inet_protocols = all
mailbox_size_limit = 0
mydestination = $myhostname, induce.tech, mbergwall2222, localhost.localdomain, localhost
mydomain = induce.tech
myhostname = induce.tech
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
myorigin = /etc/mailname
readme_directory = no
recipient_delimiter = +
relayhost =
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_use_tls = yes
答案 0 :(得分：1)
由于您在/etc/hostname中未使用FQDN，因此它与postfix的默认配置以及它如何派生mydomain参数冲突。
myhostname 参数指定运行Postfix系统的计算机的完全限定域名。 $ myhostname在许多其他Postfix配置参数中显示为默认值。
mydomain 参数指定$ myhostname的父域。 按 默认情况下，它是通过剥离第一个从$ myhostname派生的 部分（除非结果是顶级域名）。
相反，如果在main.cf中指定mydomain，则Postfix将使用 它的值为生成一个完全限定的默认值 myhostname参数。
资源：
例如，www.example.com的顶级域名（TLD）将为com，其中indu.tech的顶级域名将为tech。
因此，要解决此问题，请在/etc/hosts文件中添加FQDN，例如server.induce.tech，然后更新myhostname属性中的/etc/postfix/main.cf参数以匹配。
myhostname = server.induce.tech
否则你需要在`/etc/postfix/main.cf
中显式设置mydomain参数
mydomain = induce.tech
您可以通过在控制台中运行postconf -n来查看已覆盖的设置。