我已经用这个设置正确地运行了后缀：
主配置文件
smtp_sender_dependent_authentication = yes
sender_dependent_relayhost_maps = hash:/etc/postfix/relayhost_map
transport_maps = hash:/etc/postfix/transport
relayhost = [not.exist.dom]:555
中继主机映射
# postmap hash:/etc/postfix/relayhost_map
@my.sender.exemple1.com [my.reley.hos1]:7454
@my.sender.exemple2.com [my.reley.hos2]:7454
@my.sender.exemple3.com [my.reley.hos3]:7454
@my.sender.exemple4.com [my.reley.hos4]:7454
运输
# postmap /etc/postfix/transport
[email protected] emailport4:
[email protected] emailsport2:
[email protected] emailtransport1:
# with this sender_dependent_relayhost_maps not work
# * newtransport:
问题：如何更换目的地中继主机 = [不存在.dom]:555前往新目的地新运输？
答案1
1）将 Postfix 从 2.66 更新至 3.1
2）添加到main.cf
sender_dependent_default_transport_maps = hash:/etc/postfix/relaytransport_map
default_transport = newtransport:
3）/etc/postfix/relaytransport_map
# postmap /etc/postfix/relaytransport_map
@exemple133.com smtp:
@exemple12.ua smtp:
@exemple1.com smtp:
* newtransport: