It also happened when I registered for a training and was expecting for the tax invoice and some more info about the training(email from trainingaustralia@qlikview.com )
I know the IT department installed a Mcafee anti spam last month and I believe this is blocking those emails. When I wrote to them, this was the reply:
HI Daniel,
You need to get the sender to fix up their SPF record:
If you get them to forward this message to the IT department. They should be able to resolve it.