The message
from Klara contains these words:

As for Sacha's completely blank emails, including headers, we've been
getting lots of those lately - I have no idea what they are.

Probably spam with badly munged (forged) headers, which arrive, but
don't render into anything.

--
Rusty
Direct reply to: horrid dot squeak snailything zetnet point co period uk
Separator in search of a sig