oracle linux 7開端口

selinux was enabled

you need to add the port 587 to http_port_t

semanage port -m -t http_port_t -p tcp 587 # so that haproxy can bind to port 587

also need to open port 587 in firewall

firewall-cmd --permanent --add-port=587/tcp

firewall-cmd --reload

本文轉自chenzudao51CTO部落格，原文連結： http://blog.51cto.com/victor2016/1928037，如需轉載請自行聯系原作者