Re: e-mail with line in body beginning with "From"

[debian-user@howorth.org.uk]

> On Sat, Dec 10, 2022 at 02:57:42AM -0500, paulf@quillandmouse.com
> wrote:
> > You don't want to do this. Consider an MUA which stores your mail in
> > "mbox" format-- one email right after another in one file. The
> > delimiter is a line which starts at the left margin with the word
> > "From".  
> 
> Technically, it's the 5-character sequence "From " (including the
> space) that matters in mbox formats.  If you begin a line with
> "Fromage", or "From:", or even "From" followed by a tab, it won't
> need to be escaped/armored.

There also has to be a blank line before it (unless it's the first five
letters in a mailbox) so effectively it has to be the start of a
paragraph that starts with 'From'. (and then has a particular address
format after it. :)