:2525
(TCP)
Medium 风险
SMTP Alternate
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TCP — Email
端口概览
端口号
2525
服务名称
SMTP Alternate
传输协议
TCP
类别
Email
安全风险
Medium
端口范围
已注册 (1024-49151)
什么是端口 2525?
Port 2525 is a commonly used alternate SMTP port for outbound email submission, particularly useful when ISPs block the standard ports 25 and 587. Many email service providers like SendGrid, Mailgun, and Postmark support port 2525 for SMTP relay. It is especially popular for cloud hosting environments where port 25 is blocked by default.
TCP
Email
常用
安全注意事项
端口2525（SMTP Alternate）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。