AWeber has a feature with their plain text emails where they will automatically create linebreaks in the plaintext versions of your emails so that the width of your plaintext emails is constrained.
That works pretty well, however I am looking for a solution for how to do the same thing without using AWeber.
Let's say for example that I want to create a plaintext email that has linebreaks so that the lines are no more than 100 characters wide.
I found some online software that almost does what I want, the problem with it is that it isn't "smart" enough to know not to break lines in the middle of a word. The other problem with it is that it gets rid of all of the paragraph spacing. (You can see that software at: Add/Remove Line Breaks)
So, does anyone know of a viable solution for this?