Email header analyzer
Email header analyzer: paste the full headers a message 至 see who sent it、the servers it passed through, delays between hops、the authentication 结果.
your browser. Nothing 的 Analysis happens 是 Outlook open the message properties. 的 uploaded. In Gmail choose “Show original”,
关于Email header analyzer
Email header analyzer: paste the full headers a message 至 see who sent it、the servers it passed through, delays between hops、the authentication 结果.
属于 SmartCalcy“数据与网络”板块。它在你的浏览器中运行，无需账号，使用你自己的货币和单位（可在页面顶部更改），所给结果仅为估算、仅供参考，因此在依赖结果之前请查阅官方指引。
如何使用Email header analyzer
它计算什么，何时使用
Reads the full headers an email 和 shows the route it took、the delay 以 每件 server,、the SPF、DKIM、DMARC results. It also flags signs your browser. 的 spoofing, such as a sending domain that differs from the From address. Everything happens
使用步骤
- Outlook open the message properties. 的 Gmail choose “Show original”, 的 Open the email’s raw headers:
- 复制 everything above the 消息 body 和 paste it into the 箱.
- Read the authentication 结果 和 the route, oldest hop first.
- Check the warnings件domain mismatches.
各输入项的含义
- Email headers – The complete header block、starting with 行 such as Received:、从:.
如何阅读结果
- Authentication – SPF、DKIM、DMARC 结果 taken 从 the receiving server’s Authentication-Results header.
- 消息 详情 – 从、到, 日期, Message-ID, Return-Path, Reply-To、mailer.
- Route – 每件 server hop、its address、the 时间 added between hops.
- Warnings – Domain mismatches 和 failed checks.
公式
Received headers are added at the top by each server, so they are read bottom 至 top. The delay at a hop 是 its timestamp minus the previous hop’s. Total delivery time 是 the last timestamp minus the first.
计算示例
A 消息 with spf=pass、dkim=pass、5 seconds across 2 hops, shows no warnings. 的 dmarc=pass sent from the same domain as its From address, delivered
假设与局限
- The receiving server’s Authentication-Results header 是 trusted. Earlier Received 行 罐 be forged by a sender.
- 时间 stamps use 每件 server’s own clock, so small negative delays 罐 appear.
- 无 是 uploaded.
常见错误
- Pasting only part the headers.
- Trusting the From name. It 是 easy 至 fake、so check the domain、authentication 结果.
- Treating a failed SPF as proof fraud. Forwarded mail often fails SPF.
常见问题
Gmail? 的 How 操作 I 求 the headers
Open the 消息、choose the three-dot menu, then “显示 原文”,、复制 the header text.
What 操作 SPF、DKIM、DMARC 平均值?
SPF checks the sending server. DKIM checks a signature on the 消息. DMARC says what 至 操作 when they 操作 not match the 从 domain.
罐 headers be faked?
行 added by the sender 罐、but the topmost Received 行、Authentication-Results 从 your own provider are reliable.
Is my email uploaded?
your browser. 的 否. The headers are analysed