我有2台PC(第二台是第一台的克隆),运行centos 7。从一个不可能发送邮件。我做了一些测试,结果是这样的:
[root@PC2]# telnet smtps.aruba.it 465
Trying 62.149.156.218...
Connected to smtps.aruba.it.
Escape character is '^]'.
[root@PC1]# telnet smtps.aruba.it 465
Trying 62.149.128.218...
telnet: connect to address 62.149.128.218: No route to host
Trying 62.149.156.218...
telnet: connect to address 62.149.156.218: No route to host
PC1返回“没有路由到主机”,但是在(全局网络)防火墙上,我记录了从PC1退出到主机的数据包。子网中的所有网络配置均相同。还有什么问题吗?
还有,如果我尝试连接到端口25(我知道这是不允许的),那么我总是收到双重消息:
[root@PC1]# telnet smtps.aruba.it 25
Trying 62.149.156.218...
telnet: connect to address 62.149.156.218: Connection refused
Trying 62.149.128.218...
telnet: connect to address 62.149.128.218: No route to host
在其他电脑上,我的行为正确
[root@PC2]# telnet smtps.aruba.it 25
Trying 62.149.156.218...
telnet: connect to address 62.149.156.218: Connection refused
Trying 62.149.128.218...
telnet: connect to address 62.149.128.218: Connection refused
这可能是由于防火墙设置。您可以配置它或完全禁用它(请不要这样做)
Here您可以找到安装手册