From
Request headers
Carries an email address for whoever sent the request; crawlers use it as contact.
| On the wire | From: … |
|---|---|
| Category | Request headers |
Headers the browser attaches when it sends to the server.
How to read this
- The first digit of a status code carries the meaning: 4 means the request, 5 means the server.
- 404 means "not there"; 403 means "there, but not for you". Swapping them makes debugging slower.
- Header names are case-insensitive — Content-Type and content-type are the same header.
- Caching and CORS problems usually come down to one header line, visible in the browser’s network tab.
Frequently asked questions
QWhat does HTTP From mean?
Carries an email address for whoever sent the request; crawlers use it as contact.
QWhat does From look like on the wire?
It travels as From: …
QWhere does From appear?
In request headers.
QWhat group does From belong to?
The request headers group; the rest of that group is listed further down.