Avoiding "From" in Email

October 25th, 2017
email, tech
When I write emails I avoid starting lines with "From ". This is a habit I got into when it was common for mail clients to use the "mboxo" format. Those programs store their emails in a big text file that looks like:

From ...
From: a@example.com
To: b@example.com
Subject: ...

Message body

From ...
From: a@example.com
To: b@example.com
Subject: ...

Message body

Each time there's a line starting with the five letters "From ", that starts a new message. If you write a message starting with From then mboxo-using mail clients will "munge" it, changing it to ">From ". So we might have:

From ...
From: a@example.com
To: b@example.com
Subject: ...

>From what you said yesterday I wasn't
thinking you would come to dinner today?

From ...
From: a@example.com
To: b@example.com
Subject: ...

Message body

Unfortunately, these clients don't also change lines starting with ">From " to ">>From " [1] which means this change isn't reversible. So someone reading the message in their mail client will see the munged version:

>From what you said yesterday I wasn't
thinking you would come to dinner today?

To avoid this, for years I've been trying not to start paragraphs with "From ", though there was always some risk my email would end up with a line starting that way due to being automatically word-wrapped.

At this point, however, I don't think the contortions are worth it, and I'm planning to stop worrying about it. People still using mboxo can see unsightly from-munges, or they can move to something using a better file format.


[1] Though some other mail clients do; we say they're using mboxrd.

Comment via: google plus, facebook, substack

Recent posts on blogs I like:

Shoshannah Tekofsky on how AI agents suck at personality tests, don't express surprise, and lie to themselves

Can you introduce yourself for people who don’t know who you are?

via Thing of Things February 11, 2026

2025-26 New Year review

This is an annual post reviewing the last year and setting intentions for next year. I look over different life areas (work, health, parenting, effectiveness, etc) and analyze my life tracking data. Highlights include a minimal group house, the usefulness…

via Victoria Krakovna January 19, 2026

Why I Don't Think My Braces Were Worth It

A couple weeks ago, I got my braces off. I kind of wish I had never had them, though. When I was younger, two of my teeth were sticking out, and they looked kind of funny. I thought that my teeth were just fine, and I didn't want to get braces. But s…

via Anna Wise's Blog Posts January 3, 2026

more     (via openring)