防火墙设置:
以NS-25为例:方式VIP
set service "Mail-SSL-Pop3" protocol tcp src-port 0-65535 dst-port 995-995
set service "Mail-SSL-Smtp" protocol tcp src-port 0-65535 dst-port 465-465
set service "Mail-SSL-SMTP-in" protocol tcp src-port 0-65535 dst-port 587-587
set interface ethernetX vip X.X.X.X + 995 "Mail-SSL-Pop3" X.X.X.X
set interface ethernetX vip X.X.X.X + 465 "Mail-SSL-Smtp" X.X.X.X
set interface ethernetX vip X.X.X.X + 587 "Mail-SSL-SMTP-in" X.X.X.X
set group service "vipgroup" add "Mail-SSL-Pop3"
set group service "vipgroup" add "Mail-SSL-Smtp"
set group service "vipgroup" add "Mail-SSL-SMTP-in"
set policy id 13 from "Untrust" to "Trust" "Any" "VIP(X.X.X.X)" "vipgroup" permit log
以上仅为参考,具体根据你的网络环境设置。