I don’t have hard information but I believe so. If you have a line with more than 998 characters you’re taking a risk that your email will be rejected. But I’m

I don’t have hard information but I believe so. If you have a line with more than 998 characters you’re taking a risk that your email will be rejected. But I’m pretty sure there is never any problem with lines <= 998 characters, and it works far better on more devices than trying to break lines to fit some imaginary screen, which always ends up in a mess.