I'll be brief for now because it's late, other than to say that Apple have just this month placed a ban on Spam Gourmet domains. I've used a Spam Gourmet to correspond with Apple for since I started using Apple products (to sign up as my Apple ID, for which the process requires email contact) but a week or so back, I found that I was unable to purchase any more items through the iTunes store (the "Apps" icon). Sending in a ticket resulted in Apple asking me to prove my email address was valid.
Oddly, I can purchase "free" apps just fine. It's only paid purchases which have stopped working. I thought there might be an issue with my credit card.
I have proven (to Apple) that my Spam Gourmet address is legitimate email by pointing out that I could read any of the receipts they have ever sent me.
I also played their game and replied to an email they sent me, double-proving that my email Is valid and fully working.
Nevertheless, I have since received a reply stating that Apple have simply ruled out the Spam Gourmain domain as invalid, with no explanation as to their reasoning.
Here is the actual reply back from them:
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Thanks for choosing Apple.
Hello Lance,
I have been informed that this email domain is currently not being allowed for use with our iTunes Store. You will have to change the Apple ID and it will resolve the issue with not being able to make a purchase.
I am real sorry about this. I was not given a reason for this decision either, but this is Apple’s answer.
If needed, here is a link to assist you with changing your Apple ID:
http://support.apple.com/en-us/HT202667
Thank you,
Rick
iTunes Store Senior Support
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A sad day. Something tells me I'm not at all getting the extra support I paid for with my $100 "Apple Care" subscription.