Test plan:
Without this patch, add email address in that pref.
Run Letters.t. It fails.
Now apply patch and run test again. Should pass.
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>