That's exactly what I'm finding. That's the work-around I found. I have the string split up into 3000 character chunks with a newline after each. That works, but when I remove the split, the mail fails.

The reason I'm thinking this way also is I took the string that it had trouble with and copied it into a text editor and even the text editor couldn't handle it. Had to be broken up. So, I'm thinking this is a just a limitation that I'm going to have to code for. Which is fine but I wanted to make sure it was and not something stupid I'm doing.