Does anything need to be done when sending email either through an email client or through a website (such as an order receipt email) to make sure the email will wrap properly in the recipient's email client?

How do you define "wrap properly"?

Let's say you are using Ms Outlook and have the Plain text settings = Automatically wrap at 76 characters when sending (can be between 30 and 132), then the text will look OK in the recipient's email client - except if the recipient uses a window smaller than what's needed for 76 chrs, and the text will look like:
Test test test test test test test test test test test test
test test test
test test test test test test test test test test test test
test test test

Solution: use a smaller value (use 30 and people will hate you )

The value 76 is from the time when the width of computer screens were 80 characters (and before that IBMs punch cards had 80 columns...)

I guess there's still someone using a mail client that cannot wrap the lines automatically, so if you find a way to avoid the line breaks (using html format in Outlook?), then they will recieve one very very long line

When sending email through a website, the possibility to control the text wrapping depends on what component you are using
I think CDONTS.NewMail uses the 76 chr alternative and there's no way to change it - please correct me if I'm wrong. You can use BodyFormat = 0 (html), of course

Then I need to find out what component my website is using to send email so I can figure out how it handles wrapping? Would it be sendmail or is that something else? What question should I ask my host to find out? I just want to make sure a sentence isn't going way off the screen in someone's email client in the case that my system isn't setting it to wrap at a certain width and their email client isn't either.