SMTP — 简单邮件传输协议 on DeepSleep Bloghttps://deepsleep.fun/learn/network-protocols/16-smtp/Recent content in SMTP — 简单邮件传输协议 on DeepSleep BlogHugozh-CNSMTP 原理与报文 — 命令、响应码与 MIME 结构https://deepsleep.fun/learn/network-protocols/16-smtp/01-%E5%8E%9F%E7%90%86%E4%B8%8E%E6%8A%A5%E6%96%87/Mon, 01 Jan 0001 00:00:00 +0000https://deepsleep.fun/learn/network-protocols/16-smtp/01-%E5%8E%9F%E7%90%86%E4%B8%8E%E6%8A%A5%E6%96%87/SMTP 会话状态机、命令集与三位响应码、信封与报文头的区别、MIME 多部分结构与完整投递时序SMTP 实战与排错 — 抓包、手工发信与退信诊断https://deepsleep.fun/learn/network-protocols/16-smtp/02-%E5%AE%9E%E6%88%98%E4%B8%8E%E6%8E%92%E9%94%99/Mon, 01 Jan 0001 00:00:00 +0000https://deepsleep.fun/learn/network-protocols/16-smtp/02-%E5%AE%9E%E6%88%98%E4%B8%8E%E6%8E%92%E9%94%99/Wireshark 过滤 SMTP、telnet/openssl 手工会话、退信码定位、中继与鉴权故障排查与协议对比速查