Mail: Header shows it's from Apple Store

[Nowisee]

All of a sudden or at least I just started noticing it, mail I'm receiving (mostly to my gmail account, but also to my @me account) has the header "Apple Store" and it's nothing to do with Apple or Apple Store.  This is coming from at least 3 completely different sources/email senders.  

How do I switch this off or reset something?

 

 

[tropo]

It could be phishing email. At the very least it's spam. Mark it as spam so next time it heads straight to your spam folder.

[Nowisee]

No, these emails are coming from legit sources that I regularly get email from.

I think I am narrowing it down to a bug/glitch in Contacts.  

 

[KhunBENQ]

If I understand that right then that sounds more like your sources/senders email accounts have been hacked or their computers being hijacked/infected.

 

What do you mean with "header", is it the subject line or do you mean the sender address?

 

And the content of the mails are plausible/relevant, looking like they come from your known sources?