无法为nodemailer正确配置iptables

Question

我在发送邮件时遇到问题...我有一台运行Ubuntu 16.04的服务器，在该服务器上，我运行（使用pm2）一个node.js服务器。我要求时，该服务器必须向我发送电子邮件。效果很好，但随后我配置了iptables，现在nodejs服务器无法再发送邮件了。我这样配置iptables：

Chain INPUT (policy DROP)
target     prot opt source               destination
ACCEPT     all  --  anywhere             anywhere             state RELATED,ESTABLISHED
ACCEPT     all  --  anywhere             anywhere
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:http
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:https
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:ftp-data
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:ftp
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:ssh
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:smtp
ACCEPT     icmp --  anywhere             anywhere

Chain FORWARD (policy DROP)
target     prot opt source               destination
ACCEPT     tcp  --  anywhere             anywhere             tcp flags:FIN,SYN,RST,ACK/SYN limit: avg 1/sec burst 5
ACCEPT     udp  --  anywhere             anywhere             limit: avg 1/sec burst 5
ACCEPT     icmp --  anywhere             anywhere             icmp echo-request limit: avg 1/sec burst 5
ACCEPT     tcp  --  anywhere             anywhere             tcp flags:FIN,SYN,RST,ACK/RST limit: avg 1/sec burst 5

Chain OUTPUT (policy DROP)
target     prot opt source               destination
ACCEPT     all  --  anywhere             anywhere             state RELATED,ESTABLISHED
ACCEPT     all  --  anywhere             anywhere
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:http
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:https
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:ftp-data
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:ftp
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:ssh
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:smtp
ACCEPT     tcp  --  anywhere             anywhere             tcp dpt:ntp
ACCEPT     icmp --  anywhere             anywhere

当我接受所有输出（iptables -P OUTPUT ACCEPT）时，邮件已正确发送，因此我认为问题出在输出链中，但找不到。我尝试了很多在Internet上找到的解决方案，但我的情况下没有任何一项工作。另外，我使用nodemailer发送邮件，并使用gmail作为服务。这是我的电子邮件配置：

module.exports = {
    config: {

        service: 'gmail',
        secure: false,
        auth: {
            user: '[email protected]',
            pass: '********'
        },
        tls: {
            rejectUnauthorized: false
        }
    },
    receiver: "[email protected]"
};

我希望有人在这一点上会比我更清楚...感谢您的阅读，并祝您愉快！

Answer 1

我有同样的问题...解决了吗？