[Bug] Leading whitespace is not display in mails

That is normal behavior in html code, to preserv and render white space inside <pre> tags and ignore them otherwise. It's hard to know where this should be in effect in an e-mail, as you both want to display it as written, but at the same time support "real" html e-mail.

But for plain text, all characters, including white space, should be rendered.

@Mohjive Agreed. I confirm the plain-text bug. But I am contradicting @hoschi 's assertion in the OP that it happens with html email.

FWIW the plain-text case is not caused by format-flowed, which I originally suspected. I didn't try alternative encoding, such as base64, which the Jolla email app generates, or alternative charsets.