我有两个独立的域名ad.vz和ad2.vz,它们之间有网关.
有3个后缀服务器：
有3个后缀服务器：
> mailad.ad.vz – 第一个域中的后缀服务器
> mailsh – 带有postfix和两个网络适配器的网关
> mailinet.ad2.vz – 第二个域中的后缀服务器
Mailsh只能与一个网络区域连接.有工作继电器,每隔30秒调高/减少eth.
我开始在mailad whitch发送压力测试,发送20个字母,每30秒500KB.有时队列开始积累.我可以在maillog中看到以下消息：
Sep 4 08:51:01 mailsh postfix/error[9602]: CFA5E131A7: to=<test@mailinet2.ad.vz>,relay=none,delay=33,delays=32/0/0/0,dsn=4.4.3,status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=mailinet.ad.vz type=MX: Host not found,try again)"
每次当适配器打开时,我发送命令postqueue -f
为什么队列可以积累？
mailad postconf：
alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases command_directory = /usr/sbin config_directory = /etc/postfix daemon_directory = /usr/libexec/postfix data_directory = /var/lib/postfix debug_peer_level = 2 html_directory = no inet_interfaces = all inet_protocols = all mail_owner = postfix mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man mydestination = $myhostname,localhost.$mydomain,localhost,$mydomain mydomain = vzavod.ru myhostname = mailad.vzavod.ru newaliases_path = /usr/bin/newaliases.postfix queue_directory = /var/spool/postfix readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES sample_directory = /usr/share/doc/postfix-2.6.6/samples sendmail_path = /usr/sbin/sendmail.postfix setgid_group = postdrop transport_maps = hash:/etc/postfix/transport unknown_local_recipient_reject_code = 550 transport settings: vzavod.ru local * smtp:mailsh.ad.vz
mailsh postconf：
alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases command_directory = /usr/sbin config_directory = /etc/postfix daemon_directory = /usr/libexec/postfix data_directory = /var/lib/postfix debug_peer_level = 2 html_directory = no inet_interfaces = all inet_protocols = all mail_owner = postfix mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man mydestination = $myhostname,$mydomain mydomain = vzavod.ru myhostname = mailsh.vzavod.ru newaliases_path = /usr/bin/newaliases.postfix queue_directory = /var/spool/postfix readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES sample_directory = /usr/share/doc/postfix-2.6.6/samples sendmail_path = /usr/sbin/sendmail.postfix setgid_group = postdrop transport_maps = hash:/etc/postfix/transport unknown_local_recipient_reject_code = 550
运输设置：
* smtp:mailinet.ad.vz vzavod.ru smtp:mailad.ad.vz
解决方法
看起来您的情况与本文中的场景类似：
postfix in dialup machine.
从那篇文章中可以看出,这里有一些考虑.
>禁用自发SMTP邮件传递(如果仅使用按需拨号IP).
使用以下参数,除非您手动运行postqueue -f,否则postfix不会尝试发送电子邮件.将此参数放在main.cf中.更多信息,请参见here.
defer_transports = smtp # (Only for on-demand dialup IP hosts)
>禁用SMTP客户端DNS查找(仅限拨号LAN).
禁用Postfix SMTP和LMTP客户端中的DNS查找.禁用时,将使用getaddrinfo()系统库例程查找主机,该例程通常也会在/ etc / hosts中查找.因此,将mailad.ad.vz的条目放在/ etc / hosts上.例如
# echo "192.168.1.99 mailad.ad.vz" >> /etc/hosts
并在main.cf中添加此参数
disable_dns_lookups = yes #(Only for on-demand dialup IP hosts)
