Is port 987 (Microsoft MAPI/HTTP) dangerous?

Port 987 is classified as medium risk. It is commonly exposed but consider using encrypted alternatives where available and monitor activity.

Should port 987 be open on my firewall?

Port 987 can be open but should be monitored closely. Keep the service updated and prefer encrypted alternatives where available.

Port 987 (Microsoft MAPI/HTTP) uses the TCP transport protocol and falls under the Email category.

:987 (TCP)

Medium 风险

TCP — Email

端口号 987

服务名称 Microsoft MAPI/HTTP

传输协议 TCP

类别 Email

安全风险 Medium

端口范围知名端口 (0-1023)

Microsoft Exchange MAPI over HTTP, introduced in Exchange 2013 SP1 as a replacement for Outlook Anywhere. Modern deployments prefer port 443.

TCP Email

端口987（Microsoft MAPI/HTTP）被归类为中等风险。虽然此服务通常会暴露，但请在可用时考虑使用加密替代方案。

建议：保持服务更新。监控日志以发现异常活动。