[ILUG] [OT] mail headers: "from" vs. "from:"

[Ronan Cunniffe]

Quoting Waider <waider at dspsrv.com>:

> The 'From ' line is a unixism, which traditionally contains the sender
> envelope address (MAIL FROM value). You will note that the POP protocol,
> for example, doesn't give you access to the 'From ' header, only
> the 'From:' header.

Most importantly (?) it's how some mail programs (e.g. pine) identify the start 
of a message in a mailbox file: one or more blank lines followed by a line 
starting with 'From '.  Useful if you've ever had to reconstitute a 
scrambled mailfile by hand.

Ronan