That may be the case as these e-mails seem to come from different senders
I wish more people knew about and would use OpenGPG it may not be perfect, but at least we can sign e-mails. If more people used it, then I would not get recipients trying to open a .asc file thinking it was an attachment.
@zleap I got five today from Boots the chemist. All identical. I've been selected to receive free perfume.
All from the same sender, but checking the headers shows different senders.