Q: How to configure OSX Mavericks 10.9 Mail to Text Wrap / Word Wrap

Same problem here. Google Apps seems to be the problem emails.

Unfortunately, no. I'm hoping Apple pushes out a fix in the next update.

I am having the same problem. It is not clear to me that a particular initiating email client is producing the problem. Perhaps some embedded control character. Once it appears in an email conversation it is perpetuated in all replies. Certainly annoying.

I'm having the same issues with word wrap. It is also doing it on my phone, seems that this only happens when I am recieving messages from other mac users though.

C'mon Apple, pull yourself together.

same problem and applies to emails received from both Macs and PCs and from different organisations.  conclusion is it is a Mavericks problem and not a sender issue.

I am also having the same issue. This is very unacceptable as I use Apple Mail for work and have had to use Gmail in my web browser. I have not had this issue on my phone, yet... Please resolve this quickly.

Seeing the same problem.  Here's one clue I found, at least for the emails I am having a problem viewing.  They are long email chains and at the very end is one of those generic corporate disclaimers ("This email may contain confidential or priviliged information....") and the font for the disclaimer is Courier New, which is a fixed-width font, wheras all the other fonts in the email chain are either Arial or Calibri (and the email chain has bounced back and forth between my Mac and various PCs, probably using Outlook on their end). 

If I forward the whole email chain to myself including the disclaimer, then the received email still has no line wrapping.  If I forward the whole email, but delete just the disclaimer, then the received email has correct line wrapping.  So maybe it's a problem with having fixed-width fonts and non fixed-width fonts in the same message / email chain?

Also, when printing the emails with the wrap problem, there is no wrapping in the printed version either, plus all of the printed fonts become really really tiny.

But none of this was a problem before Mavericks.  Frustrating that something as basic as a Mail client isn't properly QA'd for fairly basic requirements by Apple before they release it.

I'm also seeing the tiny fonts for printed email problems when an email in the chain has an image in it....I need to start a new discussion for that.

I have been having this problem too, seemily started with Mavericks.  I was completely stumped, but Kevin's comment above led me to figure out a few more details.  The emails exhibiting this problem for me also have a disclaimer at the end of the message.  If I reply or forward the message, the message looks OK (correctly word wrapped) while editing, but when I receive a copy of the forwarded or replied mesage, the non-wrap problem appears when viewing the message (and the width of the non-wrap

HOWEVER, as Kevin points out, if I delete the disclaimer, then the sent message is correctly word-wrapped when viewed.  Following up on that clue, I discovered that the disclaimer for the emails where I see the problem is in an HTML <PRE> environment (i.e., pre-formatted) with no carriage returns, so it seems that the Mail application is respecting that HTML formatting for the disclaimer, and the length of that <PRE> formatted text defines the width of the window for wrapping all other text in the message.  Similarly, if I forward the email and delete only PART of the disclaimer (remember the disclaimer appears to be word-wrapped in the email as you edit, with no hint of the embedded HTML formatting), then when I receive the email the window now "wraps" to the width of the shorted length of the disclaimer text.

So, we need Mail to be able to wrap text to the window width in ALL cases, either by ignoring the HTML <PRE> environment or disable HTML .  Even just showoing a message in plaintext is fine, but it sounds like this option no longer is available in Mavericks:

https://discussions.apple.com/message/23526803#23526803

https://discussions.apple.com/message/23485817#23485817

10.9 has been the worst upgrade I've ever done since using MBP (2002), what a mess. This mail text/word wrap is indeed the next issue (along calendaragent eating up my RAM), non-sync with Google. Apple, always trying to distinguish themselves from the crowd, did it again.

Easiest way out is just to use Postbox ($10), even gives you a "spinning wheel"/activity indicator when checking multiple mailboxes ;-) http://www.postbox-inc.com/

From my experience, the problem is with wide tables pasted in from Word (see here).

As yet I do not have a solution.

I'm seeing the same problem with all emails from my church's office.

@kevin @joel you guys have good specific observations - file bug reports https://bugreport.apple.com/

Or for non-developers, submit bugs to:

http://www.apple.com/feedback/macosx.html

This is an irritating bug

Grrr