sm-mta[xxx]: gethostbyaddr(x.x.x.x) Failed: x
当我执行nslookup(例如nslookup gmail.com)时,它说它无法解决并且连接超时.在花了一整天的时间并尝试各种各样的事情后,我决定将我的域名服务器放入我的interfaces文件中,按照：https://askubuntu.com/a/331636
这减轻了我使用nslookup时出现的问题,但在尝试发送邮件时,我仍然在日志中收到相同的错误,除了我的公共IP地址没有显示,只有私有IP地址.例如
sm-mta[xxx]: gethostbyaddr(178.x.x.x) Failed: x # public IP error not showing anymore sm-mta[xxx]: gethostbyaddr(10.x.x.x) Failed: x # private IP error still showing
我已经看了很多关于这方面的文档,我仍然不确定我做错了什么.我已经检查过sendmail正在使用端口25.由于我只发送邮件,我是否需要担心我的服务器有关MX的DNS记录？
在/etc/resolv.conf：
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8) # DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN nameserver 2001:4860:4860::8844 nameserver 2001:4860:4860::8888 nameserver 8.8.8.8
/etc/dhcp/dhclient.conf：
option rfc3442-classless-static-routes code 121 = array of unsigned integer 8;
#send host-name "andare.fugue.com";
send host-name = gethostname();
#send dhcp-client-identifier 1:0:a0:24:ab:fb:9c;
#send dhcp-lease-time 3600;
#supersede domain-name "fugue.com home.vix.com";
#prepend domain-name-servers 127.0.0.1;
request subnet-mask,broadcast-address,time-offset,routers,domain-name,domain-name-servers,domain-search,host-name,dhcp6.name-servers,dhcp6.domain-search,netbios-name-servers,netbios-scope,interface-mtu,rfc3442-classless-static-routes,ntp-servers,dhcp6.fqdn,dhcp6.sntp-servers;
#require subnet-mask,domain-name-servers;
#timeout 60;
#retry 60;
#reboot 10;
#select-timeout 5;
#initial-interval 2;
#script "/etc/dhcp3/dhclient-script";
#media "-link0 -link1 -link2","link0 link1";
#reject 192.33.137.209;
#alias {
# interface "eth0";
# fixed-address 192.5.5.213;
# option subnet-mask 255.255.255.255;
#}
#lease {
# interface "eth0";
# fixed-address 192.33.137.200;
# medium "link0 link1";
# option host-name "andare.swiftmedia.com";
# option subnet-mask 255.255.255.0;
# option broadcast-address 192.33.137.255;
# option routers 192.33.137.250;
# option domain-name-servers 127.0.0.1;
# renew 2 2000/1/12 00:00:01;
# rebind 2 2000/1/12 00:00:01;
# expire 2 2000/1/12 00:00:01;
#}
etc / hosts文件：
# 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 domain.name 127.0.0.1 localhost.localdomain localhost 178.x.x.x domain.name # 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
解决方法
如果我理解你的问题,你真的只想要一个MTA来传递你的邮件.
为此目的设置一个完整的邮件服务器是过度的;所以首先这里有几个选择：
https://unix.stackexchange.com/questions/1449/lightweight-outgoing-smtp-server
如果你想要一个真正的邮件服务器,postfix将是更好的：
https://askubuntu.com/questions/457003/setting-up-a-send-only-mail-server
但是,您的DNS问题可能与此无关.
当然,可以解决服务器上使用的所有IP和主机名.要实现此目的,您需要一个本地名称服务器,用于本地地址(和名称),以便将任何其他请求转发给其他名称服务器.
但可能有一种更简单的方法：邮件服务器执行的DNS查找应取决于邮件发件人和收件人域.你应该检查,如果这些是正确的,只是限制自己的名称,可以解决.也许您已将From-address配置为指向某个本地定义的域？
要对此进行调试,您可以先尝试从命令行发送邮件,然后尽快转到PHP邮件程序.
来自队列的示例邮件将有助于检查这一点.
你能否发布一下你的输出
netstat -natp
？
只是为了看看sendmail绑定的IP地址.
我知道这个答案并不完整,但这就是我现在可以说的.
