What happened?

I was trying to set the OpenPGP header in emacs

when sending email

it turns out that if you write the third parameter

without a newline in the end

the email would broke

since --text follows this line-- would not start on a new line

How to solve it?

When customizing the variable,

use "encrypt<newline>" instead of "encrypt"

others are similar (replace <newline> with a real newline)