63.8. Example

背景，网站通常需要一个电子邮件服务器，用于认证邮件真实性，给用户发送通知，订阅邮件等等。

这个邮件系统只需要外发邮件，并不需要接收邮件，配置如下。

			
[root@netkiller postfix]# postconf -n
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
debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin ddd $daemon_directory/$process_name $process_id & sleep 5
home_mailbox = Maildir/
html_directory = no
inet_interfaces = all
inet_protocols = ipv4
mail_owner = postfix
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
milter_default_action = accept
milter_protocol = 2
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
mydomain = netkiller.cn
myhostname = mail.netkiller.cn
mynetworks = 203.88.18.17, 202.130.11.34, 147.89.27.78, 219.90.13.18
myorigin = $mydomain
newaliases_path = /usr/bin/newaliases.postfix
non_smtpd_milters = $smtpd_milters
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix-2.10.1/README_FILES
sample_directory = /usr/share/doc/postfix-2.10.1/samples
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtpd_milters = inet:127.0.0.1:8891
unknown_local_recipient_reject_code = 550
			
			

EDM服务器建议配置

postconf -e "default_destination_concurrency_limit=5"
postconf -e "queue_run_delay = 12h"
postconf -e "maximal_queue_lifetime = 1d"
			

首先投递目的主机不能并发太多，发送失败的邮件一天只需要重发一次就可以，隔天是吧队列直接抛弃无需保留。